At this moment VFS seems to be busy. For me first appointment was one month later then when I applied for. But you can contact their servicedesk (see contact details on VFS website for your country) and they have walk-in service for 1500 baht. Then even you can go next day and they really help out. Today my gf made use of that service and even there was a long line of people, she was helped at first. 35 minutes later everything was arranged in processing. Now wait for embassy to come with their verdict.