Roamans/Comenity Bank review: Credit card payment

Several months ago, I opened a Roamans credit card. I verified before opening this card that I could pay with my debit card each month. The first month, I made my payment with my debit card on time. The next month, I called to pay my monthly bill with the same debit card, again on time, and I was told by Customer Service that they no longer took payments by debit cards, only credit cards or checks. I was upset since I have only my debit card, which I use to pay EVERYTHING. I have no need for a bank account with checks, nor for a credit card, when my debit card is accepted by everyone I do business with. I have the money and am more than willing to make my payments timely, but they just refuse to accept my debit card. I would NEVER have opened this card if they would have said they would not be accepting debit card payments a month after that. I tried speaking to several customer service reps but no one would offer any assistance. Now they call me upwards of 6 times a day, leaving messages I can barely understand. I will no longer answer their calls. I have the money and am ready to pay, but what can I do to get them to accept It? Their customer service reps have always been rude and unknowledgeable for years. All I want is for this horrible company to accept my payment by my debit card and leave me alone. They are destroying my credit, and it isn't fair.