INCORRECT UPGRADE

I have done an upgrade telephonically on the 31 March 2022, I was put on a very wrong package which I will not be able to afford at the end of the month. I requested them to correct their mistake and put me on a package that I can afford. I called MTN and was informed that they they did not do the upgrade but Ignition group did it, although the call was made to MTN, 135. I was then transferred from pillar to post and did not get assistance. I am currently requesting that MTN cancel my contract with no charges and I will do my upgrade at an MTN store. My old package that is on a month to month is still active as it was not cancelled and my current new package that they put me on is totally incorrect.