The most frustrating and disgusting service EVER!!

I called Vodacom at the end of October, as I was planning to leave South Africa at the beginning of December, and was told that I can downgrade with 48 hours notice so should leave it till the beginning of December as more of my contract would have passed by then. I called at the beginning of December and was then told that I have to give 1 months notice of the downgrade. I explained that this was NOT what I was told before, they said that they would investigate and come to back to within 48 hours. This did not happen and I called them back, after being cut off more times that I could count, I was eventually told that I must then wait 2 weeks for them to check the recorded calls in order validate my claim of being told 48 hours. I explained that it was now too late as I was leaving the country, to which they simply said that it MUST go through this process and IF they find that I was correct, they would credit my account with the balance between the original contract and the downgraded contract. Not only have they not done anything but have now done a double deduction on my account!! I am now in the UK and still cannot get over the attitude and the utter arrogance of Vodacom!!