Fix errors on PHP ecommerce website

We need a PHP expert to complete/fix a few points below. Reply with your best quote and turnaround time. This is an eCommerce website on a OSCommerce platform. Must be PHP expert. Milestone will be released only when all tasks have been completed satisfactorily. TASKS TO COMPLETE: 1. Customers are having problem logging in again. New customers having problem signing up and cannot sign up using Facebook link. You will need to fix this and check that the whole system works fine: new customer sign up, existing customers logging in, Facebook login functionality, Forgot password recovery. This is what a customer said "I tried signing up with my email, and it said i already had an account. So I reset my password to log in, and then it said my credentials had expired. So I tried my other email address, and it did the exact same thing. And now I’ve tried to log in with either email, and it says there is no account associated. I also tried linking my facebook, allowed all access etc, and still nothing. " 2. Please add a link on the top left corner of the page AND on /[login to view URL] page: "Need help? We can place a manual order for you!" (url: [login to view URL]) 3. Contact form is not working - please get this running again. Error message is "We are sorry, today we don't want to be contacted by Bots!!! If this is an error, please email the site administrator."