Check to see if your credit cards are up to date. I had a similar thing happened to me, my wife entered a credit card on her Idine acct for which she is the second person and I'm the primary card holder. All the dines I had on that card where credited to her and not me, luckily I discovered the error quickly. If none of this apply to you, you must provide them copy of credit card record detailing card number, date and amount. Contact them to see, as there is a fax # and address where you can apply this info.
good luck.