Patient First, Urgent Care Urgent Care-billing practices columbia Maryland

I took my daughter in for a Strep throat culture on a Sunday. This is an Urgent Care center. I went there on a Sunday, because it was urgent. I contacted them in ADVANCE and confirmed my insurance for an URGENT care visit.  My CO-PAY for URGENT CARE is $40. I was billed $95.  Later adjusted to $65. The issue is the billing: they billed for something other than an URGENT care visit.  I am so frustrated with health care: no matter that I asked for a price IN ADVANCE, or that my insurance card says I have a $40 co - pay, no matter that I asked Patient First in advance about an URGENT care visit; NO they will not abide by that co-pay and  bill what is agreed to, or properly disclose what they will bill.  This is a dishonest practice.  I have been fighting this at every level. This is my last resort. TO ALL HEALTH Care providers and insurance companies, we just want the truth: A price when we ask for it, and a bill for the agreed price!