Was told by my doctors office that I would need to...

Was told by my doctors office that I would need to pay a co-pay in their office and that would it. I would receive a bill but not to pay it. Now they are treating to send me to collections. I expressed my concerns to my doctors office and she reassured me that I would get two bills and not to pay. Well received the third bill. UGH! Go to legit lab and save yourself from this hassle.