Lease financeal Group LLC scam, signed up for new merchant card services, sales rep slipped in LFG form for me intial after I told her NO several times New York New York

Rep came to my store to show new rates for merchant care services and equipment.  Rates did look good, but I had very bad headache and she was very persuasive.  I said OK to the service but NO to the equipment.  I already had 3 machines.     When signing she went fast thru the papers, and I ask several times, this does not include equipment, she said no.   When I received the equipment a week or so later, I called and told them I did Not want it, they said to bad, I had signed the LFG form..   The Contract should have been for Generations Party Supplies, 200 N. Jefferson, Sand Springs, OK, 74063,  a party supply store my sister and I owned for 5 years.   The store has closed and they are after me personally.   I cannot and will not pay what they want.   Is there anything I can do??  Do see there are many complaints against this company.