you only need to "bump it up" every week or two if the departure date is still a ways off. If you post the same thing every other day, you become annoying by clogging up the thread too much. If people have replied to your request, let us know if you have contacted them further yet or are looking for others.
If you are only asking for your cabin mate to pay taxes/fees , you ought to have a hard time picking the best match among many. Just show us a little PERSONALITY in writing, if you have any ;-)