Vodacom not reliable

I wanted to cancel my vodacom contract last year December but wen I did this they told me they will reduce my monthly payment and said nothing would change I ran out out data on my wifi Thursday evening,wen I called vodacom they told me I ran out of data,keeping in mind that I was always on uncapped.Vodacom advised that they no longer have uncapped,again nobody informed me I emailed the support group only for them to tell me that I must call from a vodacom number,don't know how this is relevant.If I knew that this was going to happen,I would've cancelled as I initially planned to do.Vodavom is not helping at all.Can someone pls help and let me know what I should do?