Telkom ********ly blacklisted my phone when I am a Vodacom customer!

I am at my wits end with Telkom. A phone I purchased and have used since 2019 (I’m a Vodacom customer) has somehow been blacklisted by Telkom! I can prove purchase, have the phone with box in my possession and it has been listed on my insurance since 2019 and I have provided all this info as requested via email to Telkom. I have called the call centre numerous times and have been in-store to no avail. I am just being ignored and the person who requested all the above info via email must have died because no communication or response to my mails have been received since. Can anybody assist with contact info for Telkom Legal department? Surely it must be ******* to block someones phone that is not even your customer and then refusing to act when this obvious mistake is brought to your attention.