How can you stop a lock out eviction when you were never served papers the process server lied on the proof of service so they could get a default judgment?

You can't. A process server is almost like an officer of the court. A judge will take his Word. And it doesn't matter if the server lied...it's your Word against his. And you saying he lied is like someone telling a judge that the parking ticket must have blown off the car. I bet the judge has heard your accusation a million times. The odds you can stop a lockout eviction after the fact are low.