DOWNGRADED TO PAY MORE THEN DOUBLE

In January 2021, Telkom provided its customers with a free downgrade option. I had a contract with them for a ****le and 10gig per month for R 139. I first requested for it to be canceled but the cancellation fee was the same as waiting for the contract to run its course. I was emailed by an agent to assist with the cancellation but we agreed that I would be downgraded to a 5gig a month contract for R99. January 2021, R99 was deducted but from February 2021 - June 2021, R 281 was deducted for a 5 gig contract. If I knew that this was the service I would receive, I would've stayed with the R 139 for 10gig. I have been on the phone on 2 occasions but no solution just a promise that my matter was escalated and I was going to receive a callback. 2 weeks later 0 no calls back. I have emailed the agent with who I was dealing with 0 response.