Billing customer after rejection of application

My application for an iPhone 6 was rejected but Telkom still billed me for two months. After this issue was resolved and I got reimbursed as well as the contract being cancelled, Telkom bills me the entire cost of the phone!! The bank had to step in to reverse the debit order, but then today Telkom bills me again for the full cost of the phone! I was in contact with the Telkom consultant at the iStore when they billed me for the full cost of the phone in December and yet Telkom is still billing me. Telkom please destroy my banking details and fire your *********** staff!