Unauthorized debit order

I have an unauthorized debit order for R391,40 I used to have a contract with Telkom but it ended months ago Please assist in ensuring that they stop this debit order and refund me my money

Notification is as follows : Capitec: Debit Order -R391.40 from SAVINGS ACCOUNT; Ref TELKOM ***B 201125NAEDO DR ***; Avail R***x; 25-Nov. Info ***