cant face reading past the first 2 lines - paragraphs and sentences urgently needed :P
first up, leave ur snake alone for a week, to settle in, dont handle, dont poke, dont disturb or move things around, just leave him alone
after a week, try feeding again and hopefully he'll be nicely settled enough to digest properly
and yep as smy said - get a thermostat - you dont need a heat mat and a heat lamp, and you are putting your snake at very serious risk by using both without a thermostat (both need a thermostat, not one or the other), I suggest you remove the heat lamp, and leave the mat there, snakes do great on heat mats. enclosure looks big enough for your snake to escape the heat in the short term, but you must get a thermostat, aswell as protecting your snake directly, it will also help prevent damage to the enclosure and fire
enclosure looks pretty