If denied entrance at BKK…

If denied entrance at BKK airport for too many tourist visasI understand they will liaise with your inbound flight carrier to sort thereturn flight:
– Since you cant go beyond immigration, if you have checked baggage will they arrange for that to follow you back to wherever you came from?
– If you arrive on an early morning flight and the carrier has multiple flights I presume it can be arranged to return on one of these vs an overnight stay in the airport detention center?
– If my ticket is flexi will I be able to change it and use that for the return part possibly with a fare difference penalty, or will I be at the mercy ofSomchai the airline rep who insiststo sell mea new high priced ticket for cash?