Best Buy review: Expired promotional charge 1

I set up EFT for monthly payments so I don't have to worry about late payments. I bought 2 items back in 2021 one in November and the other item in December. Both items are supposed to be 24-month financing with 0 interest in 24-month months. I did set up 10/2023 on my calendar to pay my account for the entire amount so I don't have to pay any charges. Not knowing that one of the item was listed as18 month financing only. I called on October 24, 2023, to let them know and made them aware of the situation. The person that assist me stated she will get the problem resolve and would request for adjustment. The same day I asked if I could pay and get that clear so I don't have to worry about it. The representative made some adjustments and then I paid everything in full. The representative stated your balance should show up as 0 in couple of weeks or so. To this day nothing has been resolved. The worst part is they report me to the credit bureau as delinquent. This should not happen while the issue is still on going. I have a very high credit score and because of this it completely ruins me. I have called many times since October and all they said was we will send this to someone. I'm a busy working mother. Working Monday to Friday from 7:30 am to 5:30 pm. This has been really difficult for me.