Our ecommerce website is built using zancart. A couple of freelancers have done some modifications on it. The problem now is that the response of the admin side has become very very slow. Sometimes, it takes so long that I get the "internal 500 error" and can't access the admin side of the website at all. The problem could be due to some bad coding by one of the freelancers who have worked on it. We need some skilled programmer who can remove the unnecessary stuff and bring the website back to speed.