Extremely poor service from MTN Customer Care

I took out a two year contract with MTN in August 2015 (a WIFI ****le). On 28 August 2018, I send a query through to Customer care asking them when my contract will expire / expired. They answered that it will expire on 18.10.2019. When I questioned why the contract seems to be for 4 years, I was told that the contract got upgraded on 18.10.2017. I asked for a copy of the contract to proof that I gave permission for the upgrade and I have been struggling to get this from them since. Customer care takes their time to respond to my emails and then tell me to phone the sales department to get the documents send to me. When I phone Sales - they are either experiencing high call volumes or the automatic voice wants info from me that I don't have and I cannot continue with the call. Emails have been going up and down for weeks now where MTN is not prepared to help me via email or to get the sales person that did the upgrade to phone me back. I am very disappointed in the service that I received. I would cancel this contract as soon as I can and would never do business with them again.