MTN GIVE PATHETIC SERVICE

I had a contract with MTN for the past 18 years, I was a trusted and loyal customers throughout my dealings with them. I recently experienced network problems in my area and I escalated this, I was told to do a sim swap, I did that, ended waiting my money because it never worked. Because of this persisting problem I asked them to migrate my number to pay as you go and cancel the contract. With a lot of struggles that was done on the second of July because my contract ended on the 30th of June. Since then I cannot receive any calls on my phone my phone says my number is incorrect. I have been calling speaking to them the contract department says it’s PAYG, and PAYG says it is contract . No one can help me, are they getting back at me because I cancelled my contract. I thought MTN was a big respectable organization. The manner at which I am treated is not acceptable taking in to consideration that I had problems with their network that they could not resolve. I might not have the muscle to do anything about this but I will make sure the SA knows about this, I will spread the word of mouth. This is not fair, nobody knows what must be done. This is so pathetic for such a big organization. When the time come I must take my router contract away.