frustrated parent and son

My teenage college student son asked to join the gym and approached Virgin Active Canal Walk. He asked for a month to month contract and assumed that was what he was signing up for. When he resigned from his part time employment and informed Virgin Active of he's decision of terminating the contract it was then he found to my astonishment the contract cannot be cancelled as it is not month to month as requested. I cannot comprehend how an institute like this entrap young people and ensure they start there adult life with a bad credit record due to non payment. We have contacted the sales person and his manager and was referred to a call centre. We feel that they were at the forefront of the matter to begin with and are now ***ards hiding behind a call centre. I will fight this all the way. How do you sell a two year contract to a 18 year old student with temporary employment. Please advise if a representative ever responds to this complaint.