these guys will do anything to make you get into contracts. I can assure you that this kinds of contracts are not legal and even if you void it, there is nothing they can do.
just report your credit card stolen and they will keep calling you to get your new credit card info.
don't answer the phone and if you do just say wrong number.
too can play that game.
you think they going to get a collection agency to collect a few grand from you? it cost more to hire a collection agency.
they are just trying to scare you, i know of these companies all too well.