Bill gone UP, despite negotiating a new contract for LESS!!

OK, contract ended next month, and managed to get the same deal on a lower price, for next 18 months. Paperwork done, and emails received saying all is sorted. Yet, have now received a bill for MORE than the agreed new deal, in fact 60% MORE!!. (£160 instead of £100) for the next month!! 

So, looks like I will be cancelling, (within 14 days cooling off period) and moving somewhere else. Rip off VM.