HANDED-OVER FOR A CANCELLED CONTRACT

In January I wrote a review about Vodacom billing me for a phone that I had returned to them. I also wrote to their customer service, and I was phoned by a consultant who acknowledged receipt of the phone, apologised for the mishap, promised to cancel the contract. I asked to send me an email confirming that the contract was cancelled. Lo and behold, today, 3 months later I received a call from MBD because Vodacom has handed me over- for the phone that they have in their possession. I even have an email confirmation that the contract was cancelled. WHAT THE HELL IS GOING ON AT VODACOM???WHY HAND ME OVER WHEN YOU SENT ME AN EMAIL CONFIRMING CONTRACT. IN ACTUAL FACT, VODACOM MUST STILL REFUND ME MY R100+ FOR THE CONNECTION OF THE PHONE THAT I HAVE NEVER USED. IF THIS IS NOT **** SERVICE, I DON'T KNOW HOW ELSE TO CHARACTERISE THEIR SERVICE. I forwarded the email confirming cancellation of the contract to *** as per MBD consultants, I WAIT WITH BATED BREATH FOR VODACOM TO SORT OUT THEIR MESS!!VERY DISAPPOINTING INDEED VODACOM!