Minor Modifications and Fixes to a coded php script

I bought a script here on freelancer but the programmer had many bugs on it. Its a script sort of like freelancer.com but the concept is different. the feedback feature does not work and that is the only most major problem this script have. I need that bug fixed and some minor add-ons to it. Small job should be completed in about an hour or two max. Experienced programmers only. Include your portfolio with your bid. Thanks