no communication and very bad service

At the end of July 2017 summer mobile called offering to upgrade my account to 2 handsets whereby I would be paying close to R580 per month on the 4th of August I received the package only to find out that there is only one hand set I queried it with the delivery guy who referred me to call the number on the signed copy he had. I immediately called whereby MTN referred me to summer mobile unfortunately the only advise they could give me was to return the hand set and re do this I sent emails back and forth requesting for pickup which eventually happened in September I was then liaising with a lady named Lucia at Summer mobile since the time of collection wanting to know what’s the next step with no help I tried getting MTN involved whereby they just put the blame back at Summer mobile after some period of calls made by me and emails on a daily bases I was told that MTN warehouse is currently the problem as they received what was returned but summer mobile would need a RMA number from MTN to cancel this contract. OCTOBER /NOVEMER/ DECEMBER END JANUARY 2018 PASSED then only after long emails and calls made once again by me a RMA number appeared but now the tricky side comes I ask them how soon can they cancel this so I can move on with my life and pay MTN what I have used of their data in the 3 months before my account was suspended. I received a bill of R4000 how can that be possible if I never used that much data nor did I have the privilege of using the handsets that was offered instead MTN is telling me they can reduce it to R3000 and that amount includes insurance . BEFORE THE PROBLEM COULD HAVE BEEN RESOLVED ad already gone and handed me to their attorneys which I don’t understand why

How can that be when I have mentioned this to SUMMER MOBILE that this needs to be resolved before it came to this point

Please I need advice or help cause this just makes it bad on my records when I have been a liable paying client with MTN for over 8 years