Beelzebub can be contacted through most standard rituals. He does not appreciate sacrifices. They’re messy and they tend to smell. There are worse things than blood involved in a ritual sacrifice and it means you end up in trouble, which gets blamed on him, how would you feel?
The Grim Reaper is contactable by ending your life – Don’t do that. You can also whisper sweet nothings into the last dregs of a well made long black coffee and he catches those and makes the words into tiny paper cranes which he floats upon the Styx when nobody is looking.
Try twitter if you must contact Ross Young. He doesn’t really respond to anything else. @InkDisregardIt (yes it is a weird twitter handle but then he’s not the most normal, is he?).