MTN Retentions department service

I have been a contract customer of MTN for over 12 years. I have always had a two year contract but upgraded to a new contract that I thought was for 24 months but obviously when I last upgraded the online consultant changed it to 36 months. When my phone no longer worked 2 months before the contract period was up I was told to contact the retentions department which I then did on the 17th of June. After contacting them there were numerous issues and delays in getting it done although the approval had been obtained quite quickly and after numerous promises not met it was actioned on the 02nd of July and a received it after that thereafter after including customer care in my email . I received a sim with the new phone and when I eventually had a chance to put it in my phone (as I had then started using an old phone of my husband 's) and phoned the activation team I was told the sim was for another number. I was told to phone retentions who would be able to resolve it quickly. I sent an email notification to the person I had been dealing with on the 24th of July. I eventually did receive a call back the next week and got the feedback that they wrong contract had been upgraded and that the had updated my Huwaeii router data contract instead of my phone contract. I had wondered why there was a problem with my router and thought it might have been damaged with an electrical storm. I was told that the problems would be resolved within 2 to 24 hours. Having sent numerous emails and having the matter escalated and wanting to speak to a supervisor was told the matter needed to be escalated to them first. That was 48 hours ago and I still have not received feedback. I indicated to the individual taking my call if I did not get a response I would need to put the bad service I had received out on a public forum. After holding on numerous occasions and not getting through today was the last straw when after holding for another 30mins was cut-off once again as the person took my call. I would like the necessary done so that I have wifi access using my router and that the wrong upgrade is sorted as obviously this is going to affect the billing too.