very bad service

in 2020 when my son was in Grade 11 I took out a two-year contract for him at Edge Fitness. After 2 years he decided not to renew and told the staff at the Walker Drive branch that he would not continue with the contract. Now 2 years later I get a huge bill from a debt collector asking for 2 years worth of money. The worst part is , that they are trying to get the money from my son, and he was not the one who signed the contract ...I was. How can Edge now expect him to pay .