24589 Admin Area Needs Correcting

I have had some work done on my site by a Scriptlance Programmer and he has done more harm than good. I need someone to correct what he has done to my site. [login to view URL] My admin section is not working correctly - *I am not getting orders sent through to my email address *Customers payments dont seem to be coming through *Q & A page not working. I cannot access this page to view/answer the questions sent in. *Information stored in the Account Information section appears to disappear each time I load it I generally need someone who knows what they are doing with this type of script. I am loosing money as we speak by this not operating correctly Please help me !