Northern Leasing System Uncancellable lease misleading New York, New York

I wanted to cancel my service to Northern Leasing. Instead they told me to buy out their lease for $1390.26 dollars. I wasnt informed that the lease is uncancellable, they told me to sign the contract on behalf of my husbands name just to go on with the lease, now I'm stuck with the lease without using any transactions every month. I dont have anymore funds on my business. Im frustrated and confuse if this contract is legal for them to not to cancel regardless on any circumstances. I dont think its fair for small business owner like me to be treated by this Big time Companies.