How about buying some foggers? These you can open and fill the apartment and let it stay for a few hours while you go out so you don’t breath the stuff, but the bugs do. It kills all bugs. Then you come back a few hours later, open all windows to air out the place.
The web wisdom says that foggers don’t kill those bugs; the poison isn’t concentrated enough. Once they’re there, they have to be starved out (3 months at room temperature) or frozen out (well below freezing) or cooked out (well over 100F) or maybe directly sprayed out (a shag rug in the house is, I suspect, giving the bugs a snug place to live as well).
Set out a bunch of those foggers, seal up the doors and windows, and turn on the gas oven before you leave.
Problem sol-ved. No bed, no bedbugs.