They are sending you bad msg's because you are doing wrong, instead of ban and asking for 50$, just leave them alone, they will never get vouches and then they will pay 50$ themselves, they will not blame you.
but banning and asking money... it's doesn't suit's you..
Dude these days no one is giving vouches to new members, don't know why but you can see this forum..
anyways vouch for you..if you can get another vouch you can become member here.
goodluck