Vodacom *******

I have just been ripped of again by Vodacom. My wife and my cell Phone's were supposed to be updated June an July this year. When approached by us we are told that our upgrades are only due next year. When you ask customer care they say that we upgraded last year. This is how this happend, which I think is a *******. Last year in April I got a phone call from Vodacom to tell me that because we are such good clients our monthly payments were going to decrease. We were very happy about this. The next thing out of nowhere we got two Office 365 boxes delivered to us, which we do not need as we have office on our computers. This now has been taken as a upgrade so we are not entitled to a upgrade now this I think is wrong as we were never told about this. I would like to see what is done?