bad customer service

i have a contract with telkom mobile i want my cell phone to be fixed bt i need proof of purchase in order for it to be done but the store where i opened the account closed down and i am having problems with the back office giving me a copy of my contract I was on the phone for four hours today two call centre agents put the phone down as soon as requested to speak to the floor manager is that the customer service telkom has to offer its customers fisikle thabalala at the back office cant find a copy of my contract why i dnt knw this has been going on since last year already because i kept on phoning that i have a problem with my battery now i have a phone that dnt work at all and no one can help me get a proof of purchase maybe management in charge can assist me because it has been going on for a while now and i dnt think that it is fair how telkom treat its customers