BANK CHARGES...REFUND

I AM BEWILDERED AND DISGUSTED BY WHAT HAS/STILL HAPPENING I CHANGED MY BANK ACCOUNT DETAILS ABOUT A YEAR AGO AND YEST I AM BEING DEBITED ON THE OLD ACCOUNT WHICH I DONT USE .I CALLED IN COUNTLESS TIMES TO CONFIRM THE CHANGE AND I AM TOLD THE SAME THING EVERY MONTH THAT THE DETAILS HAS BEEN CHANGED AND EACH TIME THAT YOU GUYS DO THAT MY ACCOUNT IS SUSPENDED BECAUSE OF YOUR MISTAKE AND THEN THE FOLLOWING MONTH YOU DEBIT FROM THE CORRECT ACCOUNT BUT WHEN THAT IS DONE YOU STILL DEBIT THE OLD ACCOUNT THAT AMOUNTS TO MORE DISHONOR CHARGES I REALLY HAD IT WITH YOUR COMPANY THE CHARGES THUS FAR IS R650.69 IF NOT MORE IF YOU DO THE SAME THING AGAIN THIS MONTH ,IF I AM NOT REFUNDED THE FUNDS BECAUSE OF YOUR FAILURE TO UPDATE BANKING DETAILS PROPERLY I WILL TAKE THE MATTER TO ICASA AND GET IT SORTED ***PLEASE CALL ME ASAP**