united health care Rally dept

I used the United Health Care website to find "in-network" hospital and selected it for the visitAfter I've got a bill, I found that doctors where charged/billed as "out-of-network"In this case, the United Health Care covered only the maximum allowable, applicable for their "in-network" doctors and made me responsible to pay the rest of the bill, so that I had to pay $more, then I was supposed toAll attempts to appeal within a company failedUHC *** me that repeating that "we processed it correctly", chronically ignoring the part that they lied that the facility is not fully "in-network"I requested an external appeal and they simply said that they are not dealing with it and advised me to use a private lawyerSo, why am I supposed to be responsible for this? They didn't say any kind of information that the facilities which they list as "in-network" can still have "out-of-network" doctorsI believe they simply don't want to pay them and this is how they do thi