Bad customer service

I have been calling Telkom and they have been sending me from pillar to pillar. On 5 January 2024 I called to dispute a double payment made in 30 December 2023. Both sales and billing lodged a dispute to be refunded. They indicated cared that I will receive a SMS but normally all disputes are resolve within 72 hours. Today is 11 January 2024 I have not received any response. When I called I have been sent to dial another number for billing department and all the time I dial it doesn’t give me an option to speak to someone other than hearing what was billed. This is a bad customer service and all I want now is to cancel this contract