They never answer or return calls!! VM is always e...

They never answer or return calls!! VM is always either full or unavailable. When you do leave a VM they DO NOT call back. They haven't corrected their mistake on a file with my insurance. They said if facility doesn't correct or file properly, doctor may turn around and bill me. Doctor will bill me for their own mistakes and for not filing peoperly on my insurance and for not getting paid?? Nah!!!