Payment date change request

I contacted dstv to change my payment date and was advised request was done as I changed date to the 7th monthly. Today the 5th of March my subscription is suspended and when I contact them was advised the request was not done and I still need to make a payment. This is a problem on their side. I requested a call record to be listened to as proof. It seems like it can't be done. This is a negligence on their side but they are making it my problem.