Family Dollar

I returned 2 sets of blinds that were the wrong size. I wanted to exchange them but they did not have the right size so I was getting a refund. The Lady helping me was doing just fine and then the Manager comes up and said a part was missing out of the opened box. I told her I did not take all of the parts out because once I found it was the wrong size there was no need to open the rest. She insisted the piece you connect to the wall was not in there. My Granddaughter and I both told her they were in the other end of the box because you could hear the screws rattle. She would not allow us to open the other end of the box. Her attitute kept getting worse until I lost my temper also and told her that I was doing just fine with the Lady that was helping me and she needed to go back to her own customers. She kept on and on with me. I am disabled and on oxygen. She told the customer she was helping that I needed to huff on that oxygen harder. I cannot believe that your store would employ someone like her. We came home and the part was in the other end of the box just as we told her. They told me the register was messed up and would not print a receipt so they wrote some kind of junk on a piece of paper and gave to me. She was rude, cussed and made a fool of herself in front of me and about 10 other customers in the store that said they could not belive how she acted. I would like for someone to contact me via email. I, my Family and Friends have shopped in your stores for many years but you better believe if this is not handled properly none of us will ever be step foot in your stores again. I have never in 60 years been treated like that in a store of any kind. Now what I am I suppose to do with these blinds that I have no legitimate receipt to?