pathetic service leads to constant disconnection of service

The worse decision I ever made was to ask my wife to open this contract for me. The service is so pathetic that I am collecting reference numbers from before I even received my handset. the latest is a query regarding payment received. Every time I get a reference number with a promise to resolve my problem, even after escalating it to a manager, and having email all relevant documentation requested, all I get is a service disconnection. Not one staff member called to assist. just notes made on the system and a sms to say that the matter would be attended to. Next thing SUSPENSION. After calling it is immediately reconnected with another reference number and after a few days we start over again. Can someone please advise me how to get rid of this useless contract and sever ties with a company that clearly does not have any respect for me and the discomfort I have to endure through their incompetence. if at the end of it all I am held accountable for the payment then so be it, but when will we get to that point. all we doing now is running round in circles and my health being affected through the unnecessary stress I am experiencing.

can someone please assist.