Refund issues from Vodacom

I didnt get a greater or good experience from vodacom. We got a call from them offering us a contract phone and we agreed to contract and did all that was required and the phone was not deliver and they still reduced the amount of which we were supposed to pay for the phone and yet we haven't received the package, we been contacting their call centre and they confirmed that the contract is cancelled and the we will get the refund in 21 days and still no responds from them. Can I get help with getting our refund back cause we no longer need the phone my email address is (***) contact number ***/ *** please assist their services is not great when it comes to helping and informing the customer about things.