Unhappy With Telkom

I had a very frustrating experience with Telkom. After my 24-month my data contract ended, I decided to get a new plan. Without my knowledge, they reactivated my old data SIM card, leading to unexpected charges for both old data sim and new sim card for August and September. I haven't used data on my old simcard. Now my account is suspended due to this confusion, and customer service has been unhelpful they just want to know when am I paying. This lack of transparency and communication is unacceptable. I do not recommend Telkom. Apparently, I should have called and cancelled. This is after they called me 100 times a month earlier to let me know that my contract is coming to an end.