DEBT RESCUE not providing sufficient answer

I cancelled my House buidling insurance with SA Homeloans which is part of the payment that Im paying to Debt Rescue in Feb which was enough time to cancel it by End March. After numerous emails and calls without getting an answer of how they are getting to the total that they are now deducting I get no answer. According to SA Homeloans they didnt get the March premium. I want to know where was the March prem allocated and I want to know why the prem they want to deduct from this month does not make sense when I told them I don` want an increase this year. End of March the premium was R12 787.03.

Deducting SA Homeloans insurance Premium of R511.20 = R12 275.83.

How do you get to R 12644.10? And please don’t tell me it is for the annual increase as in numerous mails to Debt rescue I said I don’t want an increase this year .