Service ended at month end 8 months in a row

My service is disconnected at the end of each month due to my account reaching a limit of R 0.00 !! Every month I need to contact the call centre and then wait for 24 hours for the service to be connected . My account is never in arrear as I pay it by debit order. I tried pushing the limit to R 19 900.00 to try and avoid a the disconnection but to no avail . If you try and get to a more senior person in the call centre you are told that the manager will call you back ..needless to say it never happens.... It is virtually impossible to break the veil of the call centre to inform the managing that hey have an issue with the way the billing system is working.<br> Surely I have a right in terms of the contract I signed to have a service that is consistent and available at all times as I have not renegaded on paying my account.<br> <br> Would really like to cancel the contract !!<br> <br> Leonard.