If you go to the contractor's guildquality profile, or search for the contractor on guildquality's home page. See Attachment, and then once you go to their profile you can select the blue button that ... read more
If the company is a Guildmember, you should be able to submit a review in the bottom right-hand corner of their profile page. For companies that are not Guildmembers, we don't presently accept reviews ... read more