Cancel my contract as of today

A simple upgrade left me scared. I did an upgrade at Canal Walk last night and immediately thereafter I was not able to make or receive calls no go onto the internet. 808 could not help as they could not see any fault from their side. Today I spent 2 hrs (10:00 - 12:00) at Mitchell Plain store they could not help, I was refered to Canal Walk where I was sent from 1 consultant to another (from 12:45 - 17:30) . In total I saw 5 consultants. I asked for a cancellation of the contract as I had spent the whole day with MTN without any help. It was discovered that the earphones of the new phone were missing from the box ( i dont know how). I was told cancellation cannot be done without the missing earphones. I do not know what happened to them as I was being being sent from desk to desk. I want this contract to be cancelled as of today. I have been uncontactable since last night and noone can give answers. Canal Walk store next to Pick 'n Pay clothing store.