Mtn is holding me hostage.

I have been with mtn for over 20 years. But in the last two years the service has deteriorated to almost non existent. I have therefor opted to not upgrade with them but rather run the contract to term and then port out. What a joke. I can not get thru to the retention department at all. And even tho a request was put in with them to place the number on prepaid so I can port it seems mtn does not care. I was told to wait 30 days which I did. But got billed again, and yet again told to wait another 30 days. This is ridiculous. What must've do to get away from these money hungry *********.

My contract term is over. I want to port. Can I just get some sort of assistance from the corporate machine.