Refund not paid & double billing

On the month of June 2017 I responded to Telkom Mobile June special. I was billed R200 refundable activation fee. Till to date, it has not been refunded back to me. Last month of July, I monthly subscription amount of R199 was not debited as agreed. Today I received an sms informing me that amount of R398.84 will be debited on the 21st August 2017. I called Telkom Mobile customer care on 081 180 and spoke to team leader Kabelo who did not render a good customer service and failed to resolve my query. I am deeply frustrated and very disappointed.