yep they did this to me when i had to change my contract from 3 to vodafone when they fully took over the service. I wanted (being a long term customer) a similar deal i had or at least some discounts or i would take my business elsewhere. They offered me a $35 contract which had a few discounts that took it down to $18 i think. One of the discounts was temporary, the other was supposed to be permanent. A year later i suddenly noticed i was being charged $35. after calling they denied i had any such discount, and since i couldn't find the paperwork my arguements had no evidence and so i had to suck it up. I later cancelled my contract when i realised how bad my deal was (along with the poor coverage).
robbie replied on Jan 23, 2017