Fix code and bugs for my URL shortening website

Hi all... I own a URL shortening site which was developed by a different developer team, and they have been irresponsible of late... I need some fixes for the site code, to root out the bugs in it currently... For example, since this Friday, I have been getting a weird code being shown on my page instead of the actual website... Once that is taken care of, I would like the developer to look at the code and see if its written good or in a lot of mess, and would like to discuss on how to make the site better with newer features and such... If you are an experienced programmer and good with fixing other's code, then place your bid below... First lets just get the site error fixed and running ASAP, and then we can can later discuss on getting the site refreshed up... If you have any questions, just let me know and I will try to discuss it out via chat...