Need opinion on bills in a Shared rental agreement

Hi I have recently got out of my second year rental accommodation due to me being severally bullied by my 5 other housemates. Our tenancy started July 1st and I got out of the contract November 23rd. I have spent a total of 5 nights in the property over the 5 month period. I have paid rent and bills in full. A total of £35 a month bills every month has been paid even tho I haven’t used them. My housemates have ran up a £400 bill from the date of 1st nov - 23rd nov and I am now expected to pay £66 for electric and gas usage that I personally haven’t used. I don’t really understand why I’m having to pay for this as it’s due to their threatening and racist behaviour that I wasn’t able to stay in the property and it’s a bit of a kick in the teeth having to pay for their heating when I haven’t been getting the benefits of it. Not really sure where I stand in this situation, advice would be helpful.