Telkom thieving

I don't have an account or contract with telkom yet on Monday 18 July 2022 I received an sms from telkom informing me I have an arrears amount of R797 and I'm being handed over for collection. On Wednesday 20 July 2022 I received an sms from attorneys demanding R1200 or interest and rather charges will be added. I contacted the attorneys and informed them that I don't owe telkom anything. Now I'm being treathened with being blacklisted. Telkom sort your nonsense out and remove my name from your system. I have no dealings with you.