UNHAPPY WITH DSTV MULTICHOICE

Im am very much disappointed with the DSTV multichoice. Last year around September took a contract with them, same one with exploria compact and router for R618 a month. And they have been debiting every month without any issues. Now this year January just because on the 1st it was a Holiday they did not debit my account but the money was there. This morning when i called them and spoke to Brian he informed me that now i have to pay double the amount which will be now R1236. Why???? Simple because they couldn't debit which is not my fault. And i feel they are not fair. I will never agree to that never double the amount for what???? I have wasted over R120 airtime calling DSTV to resolve this but nothing. I have been a very loyal client to Dstv for more than 8 years now and this is how they repay me? I am still waiting for their call even now. I.D *** Cell ***