Telkom won't cancel contract / collect their phone (***.)

Ordered a phone online, was called back and completed the order. I asked for a pink color. A blue phone was delivered. The day after delivery I called to have the phone collected. For 2 weeks after I got emails asking me for my address until they finally got it right and I got an email telling me that a courier will be in contact to arrange pick. A week later no courier had contacted me. I'd been calling every 2nd to 3rd day during this time to follow up and EVERY SINGLE TIME I get told that they had escalated the issue and someone will get back to me urgently. Last Sunday (5 Dec) I received a statement and I'm now being charged for this phone. I called twice and told the same thing - issue has been escalated and I'll definitely be contacted. Two days later no one has contacted me. I'm writing this because I'm going to cancel that debit order for Telkom. If this is a trick to get me to keep a phone I don't want, it's not going to work.