terrible service & no1 wants to take responsibilit

I filled in a form to cancel my contract with telkom in october 2014, paid penalty fees in november and received an email from a telkom employee in december comfirming that my contract has been closed. Telkom continued to bill me in january. I have been to a telkom store more than once a month since october last year to query about my account because the bill being sent monthly would not correspond with the information that I have been given by different telkom employees. I have even gone as far as send a complaint through their website but no one at telkom ever calls me back, like they have promised numerous times. They have billed me for penalty fees again in april, i reversed the payment and contacted telkom. they have done the same this month again, called the call centre on saturday. The call centre agent said she would call me back in 10 minutes because she is consulting her manager, she has yet to call me back. I regret ever opening a contract with telkom as they have given me poor service and have inconvienced me a lot. i dont understand how out of more than 10 employees, not 1 of them has managed to followed and resolve my case.