Debt me but i was never a member????

On 15 January 2021 i signed up at World of health and fitness with my daughter and son. We had a six month contract. The gym closed down on in April 2021. My contract only had a two month term left. World of health informed us that the gym company has taken us over and bought these contracts. However this is not true. When the gym closed my contract expired. The gym company is now still debating us for a service we are not using. Idont want to gym at the gym company. My contract is way over the expired period. why are they taking my money? I am seeking legal assistance with regards to this because yhe back story of how our names ended up at the gym company is musch worse!