Body Lab and their doggy contract

I was approached by a body lab consultant to sign for the gym no time was given to me to even read the contract the person told me if i signed they would get commission i pitied the person and little did i know that i had just hanged myself. the fact that there was a cooling period or a 30% of the whole contracts duration fee that i had to pay on cancellation wasn't made known to me. Now I don't have money to pay for the outstanding amount. Even when i try calling their offices the phones just ring non stop. Even the fact that their employees make you sign the contact seems very doggy to me now. I am very dissappointed by body lab gym and Id like to know how do i avoid being blacklisted? I didnt even once go to their premises to excercise and when I tried going there to cancel the contracts thats when it was brought to my attension that there is a 30% fee I had to pay. they even said I needed to cancel at another body lab gym not the one their consultant had told me about.