I was offered a promotional APR of 0 % interest on balance transfers and convience checks that expired on XXXX XXXX, 2015. On XXXX XXXX, I called USAA customer service to process XXXX balance transfers and was told my account was locked and I would have to call back in 24hrs to process the transfers. I called back to USAA 's customer service to process XXXX balance transfers on XXXX XXXX and spoke to a represenitive about the offer and was told that that day XXXX XXXX was the last day to take advantage of the offer. I gave her my first account number to a XXXX and XXXX credit account. The represenitive was unable to get the account to be rcognized by the sysytem and suggested that I write a convience check to myself to cover the balance and pay the account myself. The XXXX account was recognized by the sysytem and was processed that day. I was asked if I had any other accounts and after declining, the call ended. On XXXX XXXX, I noticed a finance charge on my account for balance transfers. I called USAA on the next business day and was told that I was charged due to the balance transfer not posting to my account by the end of the promotion period. I was told the check that was written was under the promotion, but not the account that was processed on the XXXX as a balance transfer. I asked why the person I spoke with did not explain this to me and was told that they were unsure as to why. I then asked why the previous customer service rep. did not just advise me to write a check for the amount of XXXX transfers instead of the XXXX and received the same " Unsure '' response. I feel that I was mislead into believe that the balances I transfered over to USAA would be covered under the promotion offered to me, especially since I was speaking to a customer service agent from the company. I then inquired about just paying off the amount that was not under the promotion and was told, I could not do that without paying off the entire balance of the card. I do not understand why I can not specify what balance is paid after I make the minimum payment. 
