Bad service, terrible service

My account was not debited on the usual dates after cancelling my account. I went instore to pay my account and have the proof. The payment never reflected on my account and as a result my account was in arrears which I settled. This morning when I went in store to go and get a refund for the payment made the consultant told me that my contract cancellation will only come into affect from the 4th of Jan 2018! What my contract ended end November 2017. And they want to refund my payment as airtime! No thank you if this matter is not resolved I will go and lay a complaint at the ombudsman. Pathetic service and incompetend staff