CANNOT SEE WHO CALLS ME, TELKOM HAVE YET TO RESPOND

I have recently changed my contract on a month to month with Telkom, Just for the sim, I bought a phone cash. For 2 weeks now I cannot see who is calling me. I have logged calls and complaints, I have been in the stores twice and waited in LONG queues to rectify this. I have been waiting for a logged call since Wednesday only to find out today the call was sent to the wrong department. A few months ago I had an issue with my data and logged a complaint to only receive a call a month later. PLEASE CAN SOMEONE FROM TECHNICAL DEPARTMENT CALL ME TO RECTIFY THIS ISSUE IMMEDIATELY. I WILL CANCEL MY CONTRACT AND HAPPILY MOVE MY SERVICE OVER.