Telkom 8ta no customer service

I got a contract with 8ta for my son and myself. Unfortunately he then put the sim card in his phone and blocked it. We unblocked the simcard and it showed unusable sim. I phoned customer care and was told I need to go to Telkom and have a sim swap. Unfortunately we do not have a telkom shop it was closed down together with the surrounding towns in our area. I have.to travel 350km to the nearest telkom shop. That will cost me over a R1000 on petrol and toll gates. I explained that to them and asked if they cant send me a new simcard and I will pay for.it. but they said no. I then asked if I can send someone with all my documentation and a letter stating I give.someone else permission to do the simswap for me and then post the simcard back to me...AGAIN they refused. But I can cancel the contract by paying for the 2 years. So now I sit with a contract and paying for it but my son cant use it. I have also sent an email but no one comes back to me. What do I do now. I do not have the money to travel that that far for a simswap.