Urgent SEO help required - Top Google Rankings Required now!

Hi, Ihave just redesigned my bicycle website. I used to be #1 on [login to view URL] for loads of keywords such as "bicycle", "folding bike", "mountain bike" etc etc. Even though the new website has been written to be more user friendly and despite more that 7000 back links to the site, the website has disappeared altogether now and I need to find out why and get it back up there again for about 10-15 keywords. There are various pages which need to be optimised. I am initially looking for someone to advise on what is causing this drop. I have gone from having 200 hits a day to zero. Please quote for analysing the problem and advising on how to fix it. If I accept your bid, we can then discuss prices for working on the website itself.