VERY VERY POOR SERVICE

A data contract was taken out telephonical with cell c data was rec the month of activation , it is now 2 months down the line no data has been received, on following, we thought the device was faulty and didnt think much of it as i was going to have it sorted out as soon as i had time it was found that the account is 2 month in arrears which i found strange on further investigation by instore agent , he found that the banking detail for the debit order is incorrect so with the result the payment not going through but in the two months no communication was rec regarding the outstanding amount

THEY ARE NOW WANTING ME TO PAY IT IN CASH Y CANT THEY CORRECT DETAIL AND DEBIT THE ACCOUNT I DIDNT TAKE DOWN INCORRECT BANKING DETAIL THE AGENT DID JUST SAYING OUR WONDERFUL CLIENT SERVICE AND SALES AGENTS IT IS DAMN SCARY