Cancellation of contract

I have on numerous occasions tried to inform Telkom that my contract *** expires on the 15th Jan 2020 and not on the 03 Mar 2020. I have sent emails providing proof of the signed contract and invoices to *** and now recently to one of the consultants *** without success. Can you please immediately cancel my contract. I have received several reference numbers #***, ***2, ***A and none of them have solved my problem.