NPC Leasing Rip off artists Tinley Park Illinois

NPC Leasing company through Retriever Credit Card Processing, sent a salesman to to my business to raise my lease payment from $61.97 to $128.00 a month.  He used fast talk and basically threatened that I had to pay it because I had signed a contract that had to be renewed. My original contract said 48 months and only one year after the salesman said because of new regulations with chip reading I had to sign a new contract.  I refused and he left saying he would be back.  A month goes by and he did not return.

I had to change companies to be compliant with the new chip card reading requirement so I signed with a new processor company and bought my card reader for $299.00.  This company was great and very helpful.  After a month I called and cancelled my old Retriever service.  I was told no problem as my strong arm salesman was fired because of his unethical practices.  I asked for the address of the NPC leasing company to return my machine and their phone number.   I called them and explained what happened and was told I couldn't cancel.  

I said because their representative had used fraud type tactics to raise my lease rate I concidered the contract null and void.  The representative then told me the address to returen the machine. Which I did.  A week later I received a letter from NPC leasing co. asking me to pay a buy out of the contract for $2,025.28.  This is why I am writing this complaint.  I have put a stop payment on my auto payment from my bank account.  Now I am wondering what to do next.