Unaccceptable response from Dstv(Multichoice)

Dstv did get back to me that Dstv(multichoice) would not allow debit orders to be paid for by credit card which was only a contradiction to an email that I received from them informing me that the debit order system would be up and running by end of October If they do not want to debit a credit card for a debit order why then do they accept payment by credit card??? Further why did they not inform me from the start that they would not be allowing credit cards to be used for debit orders. Other companies provide this facility Also responses from call centres have no authority to handle such matters, why can't a decision making manager make the call???