Unresolved issues over 4 months

I am having the most awful experience with MTN and its unbelievable. I am so disgusted and frustrated with the service that I received from MTN and Italk. Firstly I bought a unlimited router from MTN through ITalk this was round about 22 June 2025 . The router was delivered and I was inform to contact MTN to activate the router which I did and person of MTN contacting MTN the Network inform me that I have no coverage and should return the router to a MTN store as The Italk agent never check if I have coverages and that is where my problem started. 1 I went to MTN store in Westgate to return the item (not very helpful nor friendly) the lady just plain said if it is a contract they cannot take it Italk must arrange a pick up( not even picking up the phone to see how they can help.) after I spoke to MTN agent who suggested that I take it to their stores. I left went home call Italk and MTN who insisted that I take it back to the store to get an IRMS number to cancel the contract. I went to MTN Simmonds Street and got the IRMS number call Italk and MTN the very same day and was promise a call back to confirm cancellation of the contract. I call a week later to check on progress was told that the contract is cancelled but I will receive a confirmation call. 2 on the 20 July 2025 MTN try to debit my account and unfortunately there was no funds but now my account was in a negative as the bank charges me unpaid item R115.00. So I called MTN and once again was promised that they will reverted with a answer as to the bank charge and the cancellation of the contract. 3. Today 25 August 2025 I received a call from a collections company asking why I don't pay my account and I call MTN and was sent from pilar to post with 2 agents telling me there is no report and there is no IRMS number they cant help me. 4.So my account and my name has now been tarnished where no one in MTN is taken responsibility to took it upon them to resolved this issue and say let me get to the bottom of this and do the calls and make sure the contracted is cancelled and the customer is called. 5 It costing me on all fronts my name my account my time my petrol and all the calls that I have to make to them to get this thing resolved. it is 2and a half months later and no help from MTN or Italk . !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Please help