bad service and plain ignoring a client

In June payment wasn't made due to late salary payment but I made arrangements and made a cash payment and contacted them even sent proof of payment but then in July my account was debited twice,I called back and spoke to Mbali Zwane and she promised to get back to me with feedback on what to do and till this day nothing,sent numerous emails and she still hasn't gotten back to me...im tired of them giving me the run around