I understand your frustrations with reaching out and not getting much back in return, but remember that sometimes people are busy and/or may glance over emails so don’t take it personal. Like @Joseph Asphahani said, you just gotta keep on pushin’ and nag them to death (well, not really but you get my point).
I, too, am very self-conscious and hate asking people for favors so I know how you feel. You might get a rude response or two, but that’s okay!
Also, this is still early in the contest so don’t get discouraged and keep pushing. During the last week of the contest, I sold 98 copies so anything can happen up until the very last minute of the contest.
Before the age of reason and science, magic ruled the world. Now, it’s coming back and if most of humanity gets wiped out in the process....well, sometimes you have to break a few eggs.