Grant Mercantile Agency

I got this charge from a hospital visit and was charged the extra after my Medicare paid the rest. I contacted Grant Mercntile 13 months ago with my Medicare Supplement G to pay for this amount. This low life loser company dropped the ball using the info I gave them to pay this bill and a year later I now have this damaging my credit. This is the fault of Grant Mercantile Collection Agency. I have since again gave the info that is needed directly to the company that does the billing and I will see if they can actually pay the bill with the Supplement G which is a gap insurance. This is the fault of Grant Mercantile because of their incompetence.