Difficult to cancel and impossible to get a refund

On the 15th April 2018 I submitted a cancellation form to cancel my phone line and internet account with Telkom. I received a cancellation number. On the 25th May 2018 I was charged for internet and a phone line. I tried to phone Telkom on numerous numbers many times. Eventually, on the 11th June 2018 after receiving another invoice, I resorted to correspondence via Facebook messenger. I was requested to send the cancellation form to ********** I was assured that the cancellation had now been logged. Never the less on the 25th June 2018 my account was debited again. Five days after logging a complaint I received a message that they had logged my query and would follow up. On the 13th July Telkom told me that they had officially cancelled my account (2 months after I submitted my cancelation). No further debit has been taken from my account. Following 5 different attempts to get feedback on my refund I was finally told on the 15th September that my query had been escalated. On the 17th of October, I was they are waiting for the credit team to credit my account. It has been 6 months after I initially cancelled my account. I am still waiting for my money to be paid back into my account.