BAD ATTITUDE AND INCORRECT INFORMATION SUPP****

I went to the Worcester branch on the 28th of Jan to cancel my cell phone contract. I asked the consultant who assisted me what is going to happen with the airtime on the phone as I had just over R660 of airtime still available. She advised that I have time till the 29th of Feb to use up the airtime after which it will be depleted. On the 24th of Feb when I wanted to make use of the airtime still left (R646), I noticed that only R10.00 was available to use and the rest of my airtime was gone. I went to the branch and spoke to the 2IC. She checked on their system and saw that an early cancellation went through. She then logged a query that was sent to the head office-waiting period,2 days. On the 29th I haven't received feedback so I phoned the branch and spoke to the manager who was not helpful at all! She said I needed to sort it out with the consultant and the 2IC or contact 808. I contacted 808 and spoke to Shihaam. She advised that the error was on branch side and I needed to go back to the BM and provide them with a ref nr. The branch had to reimburse me. The BM refused to assist and I got really irritated. She started to shout and scream at me who's also furious. I need HELP!