Telkom Mobile Cellphone contract 8 years old bill

Good day, I opened a cellphone account in 2011. I lost the phone and sim card. Don't even know where the stupid thing is. Now I lost 42 points on my credit score, just because they started to bill last year November 2020 for R490, that I own them since 2013. How the hell do you expect me to pay you for a bill that is 8 to 9 years old. The phone number doesn't even work anymore, the phone is probably been crushed somewhere or in the deepest black whole you can find on earth. This is not acceptable and ******** to bill me after 8 years. You did not phone me, send me any form of notification, nothing, absolutely nothing. I will not pay this bill. You can stand on your heads and whistle threw your backside for all I care. I will be taking this further.