Funds Deducted from Bank Account where Device was Never Received

Telkom has billed and deducted funds from my bank account for a device which I never received. Every time I called customer care to cancel and request the refund I'd be told that the system is down and would be promised that the consultant would call me back once the system was up and running, which would never materialize. These deductions started February 2025 and still continue.