Telkom won't cancel contract/debit order

4 months ago I wanted to take out a laptop contract at telkom. The store told me to come back in a week when they had stock. A week later I did not accept the goods as it was not as advertised (old model) and told the staff to cancel everything. Since then it's been a nightmare of monthly invoices, constant significant debit orders and pointless visits to the store. Constantly being reassured that the problem will be fixed yet it still persists.Was contacted by the call centre and told them to cancel but no result. I'm left with the cost of reversing debit orders and printing bank statements as proof. Why do you have to fight for your own money, all I've ever received from telkom is a headache and I'm still paying for it. Regret ever going into that store.