I guess you just picked a wrong guy. Or it was a wrong time... I've been selling my little doodles on fiverr for years as a hobby, so it's seems kinda easy job, but even I have my ups and downs :)

Each time I ordered something on fiverr it was done in like an hour and it worked :) This is just because I ordered a really simple stuff.

I think fiverr is the best for little simple or fun projects. Something that's not hurting you if it gets canceled. 
Or something design/illustration related, because in that case you can always see sellers portfolio before ordering a gig.