Telkom poor service

I would like to share my frustration. My contract expired last year. I contacted Telkom to suspend my contract because they still continued to debit my account.I was advised that they cannot cancel the contract telephonicaly and that I had to do it on the app or on the Telkom website.I canceled the contract on the app ,however to my surprise I got a bill for R785.00 .I got a reference number after I escalated the matter I was told that someone will call but it has been almost 2weeks without any word from them.I will be referring this to my attorney's.