Telkom mobile has a poor after sales service

My husband and I took a contract with telkom mobile for uncapped WiFi +- 3 years ago. The problem started December 2018 when we relocated from Cape Town to Port Elizabeth and we were told that there is no poles to connect to in Lorraine. Since then we have been tying to cancel the contract and we’ve been going to the store I don’t know how many times. Every time we get the same email that the debit order will be reversed and we will get a refund form. It’s been 6 months paying R600 for a service we not using and it’s so frustrating