Quench USA Inc Billing procedures King of PRussia, Pennsylvania

We installed a Quench water cooler in our beauty salon in April of 2011.  Our employee doing the deal thought we were purchasing the cooler. At that time I requested in writing that all further correspondence regarding this purchase be sent to my office address.  Since last April I have received no correspondence from Quench, until last week when I got a collection notice from a collection agency saying I owed them about $600.00.  On follow-up we  learned that we had actually been leasing the cooler for $60.00 per month.  Obviously that is a ridiculous price for leasing a water cooler worth maybe $100.00, and if they had sent me any invoices I would have immediately canceled the lease.