Comcast / Xfinity review: Comcast xfinity mobile customer service

I have been a Comcast Internet customer for almost 8 years and have never really had any issue that didn't get resolved. About a year or so ago, a rep talked to me about switching my mobile carrier to Xfinity and after a brief conversation with her, I agreed to the switch for 2 phone lines, onr for me and one for my son. My payment for the 2 phone lines was $86.43. In September of this year, I called Comcast Xfinity concerning a payment reduction that I had been offered and it was my understanding that I would get the difference in my payment refunded. I did not get it so I called Xfinity again and the rep explained that since my payment had already been processed, the new payment amount would start the next month. I understood and told him that was fine. He then told me about the Google Pixel 7 and that it would not cost me anything other than taxes. I told him over and over that I would only accept it if my payment did not go up. He assured me over and over that my payment would not go up, so I agreed to accept and paid the taxes of $45.00. When I got my bill (which is by auto pay) for October, it was $109.46 instead of my regular payment of $86.43. I called customer service and the rep found that they had my plan with the GB plan and it should have been on unlimited. Also, he found that I was being charged for 3 lines when it should have been 2 lines, and that my phone number had been attached to 2 of the lines. I don't understand how 1 phone number can be put on 2 lines. I did fail to mention that when I got the Pixel, I gave my iPhone to my son, since his phone was old, so he had switched his number to the iPhone I gave him. The rep said he would deactivate the phone number from the iPhone but instead, he deactivated the Pixel. I then had to find another phone to call them back to get my Pixel back activated. So back to my payments. I understood that my plan had been corrected but in November, I found that it had not. My Nov payment was $95.70 and again, it should have been $83.46. I called them again and after explaining my problem with the payment again, he agreed to refund me the difference of the over payment for both October and November on November 3rd. Again I'm thinking they had corrected my account , but low and behold, my December payment was $106.60. Wouldn't you think if you got a refund, your account was corrected? I am at this point really, really upset so I called back and went through my whole ordeal again and requested a return label because I am not going to be fighting over my bill every month. This was on December 1st. I was told that you only have 14 days to return the phone but my answer to that is, I had no problem with the phone itself, but do have a problem with customer service and how no one corrected the problem even after I told them my plan should be unlimited back in October. I did not know the problem was not fixed till I got my November bill, which again, no one corrected my account when I called. Fourteen days had already passed when I got my incorrect bill in October...again, the problem is not the phone but my payment along with customer service. I have made several attempts to get a return label and all they do is tell incorrect information. I have been promised over and over that it would be expedited and I would get it emailed to me that day and I was to print it and take it to Fed Ex for them to print it and ship it back but it has now been since December 1st and still no return label. Can someone please see that I get a return label? I would really appreciate it. And it really isn't making Comcast look very good with your employees not telling the truth or making the needed corrections. This would not be happening if the needed corrections were made back in October. It is very tiring, upsetting, and irritating to have to call your company every month fighting about my bill and no one caring enough to correct it. As I stated at the beginning, I have been with Comcast Internet for almost 8 years and have always been satisfied with that side of customer service, Xfinity Mobile, not happy with them at all. And not meaning to be rude, over the phone, it is very hard to understand everything that is being said.