Non-authorised Debit Order THEFT!

The balance owing on my account is R 0.00, confirmed both on Telkom's app and by calling 180, but a non-authorised debit of R 4747,81 was still put through my account by Telkom yesterday, 31/08/2020.

I can't get a hold of any consultants to query this and if another debit order is put through it will affect my ability to pay my other accounts. I will be pursuing legal action should this not be attended to.