Just one suggestion on the website that would take maybe an hour to fix. Your menu is a giant, low-quality PNG. I can barely read it, and zooming in just makes it worse. You either need to make it real HTML so I can zoom in and read it, or make it a PDF. Make sure your menu and website are VERY accessible via mobile -- if its hard to read on a nice desktop display, it's going to be next to impossible to read on Firefox mobile.
Also, your "Catering Menu" link goes nowhere. There is at least one image in your gallery that says "this is a test".
The pictures look fantastic!
Sales-wise, have you tried cold-calling start ups that are near you? Or have you attended any of the start up groups / meetings / events? Or outright asked to cater them? Spend a few hours on Monday cold-calling some local government offices, they don't cater often but something like satays might be unique enough to prompt them to try it out. For tech companies, reach out to their main account on Twitter. When they book you, tweet about it to help them get cross-promotion.
At this point, it sounds like you need clients more than branding -- reach out and grab some clients!
Do not annoy them. Make sure you keep track of who you call & when, who you reached (if anyone). Even if you only reach a support member or an engineer, if it sounds good they might mention it to feed their next hackathon. Don't expect that every call nets you an order or large catering deal.