Mid-contract broadband rise and the bill has gone up again

Has anyone else had their Nexora bill jump up in the middle of contract? I’m on fibre broadband only, contract says 18 months and I’m only 7 months in. Got an email about a price rise, then this month’s bill is £5 more than last month. I rang up and was told it’s in the terms, but I honestly don’t think that’s fair. I’m in LS14. If I cancel do I get hit with a fee as well? Feeling a bit stuck.