Signed up to 24 month contract I never agreed to

Hello, 

I really hope someone could help me, I had a renewal offer 4 months before my contract was up. I put this through but also I'm the meantime, I added sky cinema for Christmas.

My contract has also now changed to a new 24 month contract that I never agreed to. I was adding an extra to my package not signing a new contract.

Not only that, the price for sky cinema was not given at the price advertised, it was instead charged at the full price, again something I never agreed to.

Now my renewal price is no longer advertised, my plan hasn't changed over to the renewal price and now instead of paying £30 a month, I'm expected to pay over £100 a month for 2 years.

At no point did I agree to a new contract at that price.

Please can someone reach out to me about this please as this has been incredibly stressful

Kind regards 

Liam