I got the price increase email this week, £33 to £42pm for M250, 27% increase.
I have FTTP in my area now, so went for 500mb with vodafone for £30pm 24 month contract with a £130 rebate voucher thingy. However, I went to cancel with VM, when I called the automated system said it would be easier to sort by text, so I thought fine, give it a go. No contact whatsoever, the next day they send an update to my contract (again no agreement from me) at £28.50pm for the same M250 for the remainder of contract, another 6 months. I couldn't be arsed contacting them again as it's always a nightmare so cancelled with vodafone under 14 days cooling off.
Faff again in another 6 months.