Outrageous Rejection Fees

My son has an account with Telkom, which I pay by EFT. The debit order is on a non-existent bank account, as I do not like corporates to dictate how much they are taking from me. I obviously therefore pay the account by EFT. Each month though, the debit order on the dormant account bounces. They charge R202 for a rejected debit order. THIS IS EXHORBITANT, an outrageous amount. Secondly, when I contacted them, with the chat service, there was no response after half an hour, and the windows just kept terminating. As soon as his contract is up in July, I will be porting to ANY OTHER network. Just definitely NOT Telkom.