Accounts ineptitude

I am so tired of being disconnected due MC's accounts dept ineptitude. I pay annually and every year I get disconnected a month before my payment is due. Each time after I pay I phone in to make sure the payment has been received and to ensure it is recorded as an annual payment. Then a month before I find out I am 1 month behind?? I have called in 5 times this month alone ( yes five ) I have been disconnected 4 times. Each I get re-connected with the promise that the account depts are looking at it. The the agent agrees I am not in arrears but only the accounts dept can credit my account with the 1 month discount I am meant to get. I get switched on for 3 or 4 days and then get disconnected on the 5th day. Each time I have to phone in and explain the whole issue again, each time the agent tries to convince me it is because of the 'increase'. After explaining again they eventually understand and agree and "escalate" my issue. Supposed 48 hrs turn around time.