Being Charged more

I am very dissatisfied with how my dstv account is handled, the last debit made from my account was in July, in August I made a cash payment of 950, after that time I received a call from one of your consultants verifying my account details, I gave her my new account number , to my surprise there was no debit made on the 15th of september, then I made a cash payment, last month a debit was made from my old account it came back unpaid and had to pay 1100 on the 24th October , the same thing is happening this month, i received an sms that 892 will be debited from my account, which was not debited, now when i check my balance it says i must pay R1121, why is that, because this is all your fault. I feel I'm being **********. May you please sort this out as soon as possible, as i do not want my services to be interrupted.