Cell C Trying to **** Ex Clients

Cell C could not provide me with fibre in Hyde Park. Based on that I terminated my contract with them. Gave notice and settled my account with them. 7 months later after my account has been in full and final settlement, Cell C is trying to process debit orders on my account! What type of *****/**** is this? Please remove my details from your database. Failing to do so, I will escalate this matter and hold Cell C liable for all costs incurred on my account. This is totally UNACCEPTABLE.