********* debit orders post contract closure

I had a data contract with Telkom which expired years back (post 24 months of the contract), however Telkom kept charging me R60 service fee because I didn't inform them to 'close' my account which I eventually did after having having a discussion with them at the start of the log down. Telkom continued to charge me so I put a debit dispute with the bank when that ended they charged R250 twice. I don't have business with Telkom, I want my money back and for them to stop striking debit orders in my account it's ********* they way the conduct business.