Gwinnett Medical Emergency Services Fraudulent and unethical business practice Lawrenceville Georgia

I went to emergency because I was seriously ill. Honestly, I was given an excellent attention and service that day. I was extremely happy by the service provided. I wouldn't mind if I pay a million dollar that day. However, after three month so, I started receiving bills for services they never provided. In addition to this, I strated receiving bills for services provided by doctors who aren't in network. They are saying the hospital is in network but not the doctors. So my insurance paid part of it but not to third party out of network doctors. I went emergency, how would I know whether the doctor is in network or not. Now I end up stuck with massive bill which they sold it to a collection agencey. I feel this is fradulent and unethical business practice. I want all the bills received waived.