O2 Internet price issue

Hallo,

I have been contacted by o2 when i tried to end my mobile contract. They offered a very good deal for mobile(o2 Free boost) and internet(o2 unlimited max) together. While sending the contracts they have changed the prices for the internet contract. Tried to contact twice after that but nothing done. this bad responses really makes me rethink on going forward with my contracts. 

I hope here at least my questions are answered.

Thanks.