moving home and being put into a new 18 month contract

Exactly same thing happened to me. My contract started in August 2022 and was supposed to end in February 2024. I’ve just checked and when I moved home in February 2023, I was sent new contract and I’m tight up in another 18 months contract ending August 2024. I had so much issues with this move and spent lots of time on the phone and on the chat with totally unhelpful people. I had yodel courier “not able to find the block of flats” and after spending hours on the phone with virgin media when I was told they don’t know why new router was sent and the old one should work (it didn’t) and someone made mistake with the whole procedure, after a few days yodel delivered finally the new router and I was able to connect the internet. I have lost a few days of work because of that. Because of all that mess I totally forgot to read new contract but I was assured nothing will change from my other contract (and then I actually found out I will be paying more and there is nothing they can do about it). I will have to move houses soon due to unforeseen reasons and I am literally sick that I have to deal with all of that again. I would prefer to end the contract (and sign with other company) and even pay the outstanding amount but now it’s £600! Can someone please contact me and help to sort it out? I’m scared to call again as it takes huge amount of time and results with nothing.