Product: Credit card or prepaid card

I purchased some items at a XXXX store. The total charged amount was {$110.00}. I don't have the exact date but it was in XXXX or early XXXX. At the time of the purchase they offered me a store credit card with a discount on my merchandise if I opened the account. I agreed to open the store credit card at that time. While opening the account they did not ask for any personal contact information. I asked them if they needed my personal information and they said they had my information on file. I assumed that I would receive a bill in the mail at which time I would pay in full because I do not carry a balance on any of my credit cards. 

Months passed and I forgot about this purchase. Then I noticed a delinquent flag on my credit bureau account for XXXX XXXX. At that time I contacted them to determine what this was for and subsequently determined that XXXX XXXX was the credit card company for XXXX. By this time there were many months of penalty fees and interest charges to this account. I did not feel that I should be liable for these fees and interest since they did not properly collect contact information for me. I can only guess at where they obtained my contact information but I do have a guess. I believe they used the address on my drivers license which was my home residence however the post office DOES NOT deliver mail to this address and all mail sent to this address is sent back. 

I tried for months to resolve this with XXXX XXXX but they would not accept any fault in this matter and wanted all fees and interest in addition to the original charges. 

On XX/XX/XXXX I finally spoke with someone who agreed to accept payment of the original charge of XXXX as payment in full and promised to remove all fees and interest. She promised to put my account back to good standing with a {$0.00} balance with acceptance of payment in full. I made this payment via bank transfer from my XXXX XXXX XXXX   account. Unfortunately, this is not what happened. They credited my account with the payment but left all fees and interest on my account and continue to charge monthly interest and penalty fees. 

I had many more conversations with them but most of them threaten me with legal action and other threats. On XX/XX/XXXX I spoke with a Mrs XXXX ( XXXX XXXX ) who told me that my account had documentation that stated they agreed to payment in full on XX/XX/XXXX and that my account would be put back to having a {$0.00} balance. Subsequently, additional statements have been sent with additional fees and penalties. When I tried to reach out to Mrs XXXX at the number she provided I was informed that she is no longer with the company. 

Subsequent conversations to resolve this matter are met with very unpleasant conversations and more threats from their representatives. At this point they will not even allow me to explain the circumstances. They go right to threats and insults and I no longer feel they are trying to deal with any good faith. 

FYI : I do not have the account number as I never received the actual credit card in the mail since they did not collect proper contact information for me. If you look at my credit history you will see that I pay my charges in full every month and carry no outstanding balances. This is may standard practice and I would have paid this account in full if I had received a statement in a timely manner.