Lease finance group They lie to me about the contract it's non canclelble Chicago Illinois

We opened the tampotary restaurant business in 4-25-2013.when this guy name cardell pole came to us asking about the processing our credit card service I was agreed ,but told him clearly this businese is only tampotary it's not long term,I dont want sign any contract,he agreed,but when we sign the paperwork he bought a lady with him,and when I sign the paperwork it's said non canclelble lease,I ask him about he said don't worry it's canclelble ,I can cancle anytime,they just need bank information to get money,so this year 7-1-2014 we have to closed the restaurant ,when I called to cancle the service,they said its non canclelble lease,even I don't use the terminal they have to get their money every month for leasing service,I told them that when I signed they said I can cancle anytime ,they said its non canclelble lease I signed there is no way to get out unless I pay the full amount 2500per terminal,I had 2 terminal.there is no way to talk to the costomer service they all very mean nothing but money,no solution to come out of this situation ,please help