Renewed contract that I hadn’t agreed to

I am very concerned because I spoke to retentions today about possibly leaving virgin as my contract is ending and I could not afford the increase in price and I was offered a new contract at a slightly increased price. I asked if there would then be a further price increase of 8.8% in April and I was told by the agent that the price I had been given included this 8.8% increase. I asked for this to be confirmed by email before I made any decision and I was told I would receive an email within 24 hours from the agent and then I should call Virgin back with my decision. This afternoon I received an email with a new contract attached. I have never received the email from the agent confirming that I would not be subjected to a further price rise in April. I am a disabled pensioner living on a state pension and I therefore only have a fixed budget. I did not agree to a new contract and consider that this is very unprofessional and could be deemed as fraud. I really don’t know what to do and I am very upset and worried.