XX/XX/XXXX I purchased a TV on a credit promo from Best Buy. This XX/XX/XXXX it was due to expire. I called someone at the credit center and asked them why the balance was higher than I thought and did my payments go to any of the promo balance. They checked and said some payments went to the regular balance which was a low amt. I asked her if she could allocate any amount to the promo balance. She checked and she said she could with 2 pmts of {$25.00}. ea a total of {$50.00}. My promo balance at the time was {$350.00} and with that credit it would be now {$300.00}. So I said are you sure it would be fixed and she assured me it would. On XX/XX/XXXX I called the payment center to make a payment instead of making it online as I always do. I talked to someone named XXXX and I told her the story and wanted to make sure the promo was correct so I made a payment of {$300.00}. When I received my statement for this month they charged me {$380.00} for interest charges accrued on the account because I did not pay it in full. I called the credit center today XX/XX/XXXX and they said they can not fix it. They said in their notes they could not fix those 2 payments so my balance was {$350.00}. I told them that I had no idea that it was not corrected and nobody called and told me otherwise. I asked to talk to a manager and she precedes to tell me the same thing that I did not make the full payment so I owe the finance charges. I then asked to talk to someone higher and they said they would have to send it to be reviewed and see the conversation and will contact me at a later time about it. I am sending a written formal complaint to the company but I am afraid that they are not going to do anything because they do not act like they did anything wrong. I would have paid the amount in full if I thought for any reason that it was not adjusted. Why would I pay the {$300.00} on time? If I did not care about the finance charges I could have saved myself some money and just pay the minimum. I do not know what else to do. 
