Pictures are worth a thousand words. yes, Pictures will help.

It sounds like maybe you got some bad feeders, or were too rough with them. Like was said above, give the snake a few days of good temperature settings, then try to feed again. Put the frozen mouse/rat in a Ziploc baggie all by itself. set that baggie in warm water for about 15 minutes. I find it helpful to sit something a little heavy on it, just enough to hold the mouse (inside the bag) under water. After 15 minutes, dump out that water and put hot tap water into the bowl. Now put the mouse (still in the sealed baggie) into the hot water for about 5 minutes. When you feel the mouse through the baggie, it should feel warm, and soft. No cold spots and not hard. Now you're ready to take the mouse out of the bag and offer it to the snake. You should use some tongs for this because when the snake does strike at it, it's fast and will probably startle you the first time or two. If the snake doesn't take it after a few minutes, you can lay the prey in the tank and leave the snake alone for an hour or so (or overnight if he hasn't eaten in a week or more) and check it first thing in the morning. If the mouse is still there, remove it. Try the same procedure in two or three days.

Hopefully your thermostat comes tomorrow and you can get the hot spot dialed in. You want the hot spot to be around 89 or 90 degrees. You will likely have to set your thermostat to a higher setting as it has to heat through the substrate you are using. The thermostat may have to be set on 93 for example for the substrate on the hot side to reach 89 or 90 degrees. your cool side can be in the high 70's or low 80's. Humidity is good. 50%-60% and even higher (into the 70's) when the snake goes into shed. Some folks keep higher humidity all the time and their snakes seem to be okay.

Handling... Once your temps are accurate and your snake has eaten, wait a few days. You never want to handle for at least 24 hours after they eat. They need that time to digest properly. With a tub that size, your bp will likely be under a hide when you open it up. Lift the hide off of him, and approach him slowly, but steadily from behind or the side. He'll likely pull his head back and just sit there. Just slide your fingers under him and scoop him up. Once he is in your hand, just move slowly, no sudden movements or he'll flinch and then you'll flinch, and then everyone is stressed out. LOL. As said above, then just sit down with him, either on your bed, or a towel, or on your lap, and let him do his thing. He may sit in a ball or coil for 10 minutes, or he may stretch out and start exploring a little. Just keep an eye on him and after 5 or 10 minutes, pick him up and put him back in his tub. The next day, repeat. After a week or two, you can maybe try to keep him out 15 minutes. You'll find some days they seem to enjoy being out and other times, they just want to be left alone... like any pet, or person. LOL.