Pathetic service

I have been paying my contract via EFT then in Jan 2023 I called and cancelled it after it expired in Nov 2022. I kept the insurance which was R120.00. My account was up to date and I continued with the EFT then suddenly I saw an attempt for the debit order from Telkom, I tried calling with no success as every time I called, the call will cut and I was referred to the WhatsApp chat and get an sms with the number. In May Adminplus cancelled my contract because Telkom was not paying and claims I owe them, they continue billing me even though the insurance is cancelled by Adminplus and tell me they won't rectify their billing and I must pay them. I am so frustrated and regret ever taking a contract with Telkom. Customer service is worst, the consultant are rude and show no willingness in helping out. I now "owe" more than R800 when I never missed any payment in my account.