Lack of customer service and passing the buck

where do I start, my nephew has a contract which I use and my details are there as a contact person,for over 3 months we have been calling the call centre & getting no response,finally at Telkom east gate eddie gave us a reference number ***6 ,we have had the contract since last year nov,did a sim swap when water fell on the sim card,since then cant make calls,Daily calling the technical dep on *** ,have spoken to almost 6 different supervisers from Paul to lebogang to Siphomandla .yet every day im told some one on the next shift will call me & unless I call no 1 has the decency to call me back. Initial notes stated lebogang spoke to me and the case was closed bcoz I was satisfied,that in itself is false info as that never happened I would like a recording of that call,so 3 weeks the query is still unresolved with the query being passed from person to person.Not only am I at the telkom store almost daily i am calling in daily and getting no feedback,they cant hear me on my telkom line & have to call me on my voda com prepaid line,I am paying for a service I am not using.I require urgent feedback and have a list of complaints regarding their slack service.HELP me please