Irritating calls

I have no contract with MTN, I purchased and returned the product on same day. This is the ref no: ***. I owe them nothing and i owe you nothing stop bothering me please. You are very annoying and your staff cannot communicate properly and neither did they ever return my calls or follow up with MTN and thats why im taking this route. <br> That's another ref no: Ayanda<br> REQ:***<br> Sort this dispute with MTN