Telkom refuse to cancel my contract

I canceled my contract on April 24, 2025, understanding that I would have to pay a penalty for canceling it before its expiration. However, Telkom refuses to cancel my account, and I am at a loss for what to do next.

I am still being billed monthly for a phone that I no longer possess and for data that I do not use since I have confiscated the SIM card.

I strongly advise against taking any contract with Telkom. Their call center is ineffective; even if you call 100 times, they will assure you that your issue is resolved, but it remains unresolved.

I received a bill for June indicating that the contract is still not canceled. I want this contract canceled as soon as possible. This situation is unacceptable, and I no longer need their services.