This is the wrong way to do it. CK doesn't want the hobbyist (client) to send the pm to him. He wants the providers to send the pm with the guy's handle in the title saying "Vouch for Mauricio_G" or whatever the handle is.
You need to make sure you've seen established providers who are well known to vouch for you... at least 2 of them to send in a vouch each to ck1942 saying they met you, you were nice, you paid, etc.. The provider can cc: you on the PM to ck. Providers who just joined or are pretty new won't work.
If the provider doesn't hear back from ck in a week or so, the provider should go ahead and pm ck again.
The hobbyist contacting ck just backlogs ck even more and causes other things to get pushed farther back. CK is not going to contact every provider and ask her if she saw so and so.
Follow the directions here and you shouldn't have a problem. If the provider doesn't hear back, and she sees her client isn't verified yet, she can follow up with ck again. Easy peasy.
Where to start - hobbyist candidates
FROM CK1942: