********** contractors

as walking at the mall and one of the 'owners' called me and said that they had a promotion for their new gym.. now they were going to give me a voucher to come and work out at the gym for 30 days and if I loved what I saw.. I would then get into a contract with them.. They took my ID and my card and said that they wanna see if it's valid... They are not putting me into any contract with them .It's just a voucher..but I told the guy that I no longer want the voucher and he said he cancelled it only to find out that he made a contract that I never requested .. and I now apparently owe them R450 and threaten to take legal actions in 7days