Wont refund for Debit Order Contract cancelled 2 days after recieving device

I app**** for a LTE Data Contract on the 14th Dec 2017, it was approved, the router and sim card were delivered on the 18th (Start of contract) I had issues with the router from the get go where I could not connect at all, I called for advise on the 20th Dec 2017 at 15:38 and was advised that the router needs a software update (brand new out the box). I was told to take it to a store and they will do that, if I wanted to go to a store I would of app**** for a contract in the store and not online/over the phone. I then told them to cancel the contract I was advised they cant cancel now they need to collect the device first. Fine lets follow process, a sms was received on the 20th December 2017 at 15:49 advising RAM will collect ***. A debit order of R107.93 went off my account on the 20th Dec 2017 at 20:46. I called on the 21st December 2017 at 11:47 to confirm collection and was advised it can take a week, I told them I refuse to accept that because that will mean my contract is cancelled out side the 7 days. The Router and the sim were collected on the 21st December 2017 at 13:00 (I have the waybill). I received a sms at 11:15 on the 22nd to advise the device was received at the assessment centre at 11:17 on the 22nd December 2017 (Same day) I received a sms to say that the assessment is complete and it has been approved as an OBF(out of box fault) and I must contact or visit ,my point of booking for a replacement this after requesting a cancellation numerous times not a replacement. I then called at 11:24 and 11:43 to confirm the cancellation Ref: ********** ********** 85 (This is all within 4 days of receiving the device), I asked about the debit order that went off on the 20th, I was advised that it will be refunded within 72 hours. On the 27th at 14:28 to advise that the refund will be processed on the 7th Jan 2018. I called cell c again this morning enquiring about the refund and was advised I wont be refunded as this amount was for November (How the hell is that possible contract was only approved on the 14th Dec 2017) I was then advised that there will also be an additional debit order because the contract was only cancelled on the 27th December 2017 and thus is takes 30days to cancel (how did it take 5 days from my confirmation on the phone that it is cancelled to them cancelling on their side) I will not accept this I had the device for 3 days and cancelled numerous times. I was advised today that they will escalate it and speak to the consultant that phoned me on the 27th December 2017 about the refund taking another 7 days.