Tekom does not close account when instructed to!

Telkom last payment was made on 14 Jan 2020 (Tel *** ino S du Randt) and the account was then closed at Key West. Please can you urgently contact me via email (email only) so that this can be sorted out as an sms was received stating that R2070-41 is owed. The property was sold and as the phone is a fixture this account is absurd. Telkom is known for not closing accounts when they are instructed to.