Google App Engine expert needed for quick job

***Canadian/American applicants only please*** Long story short, the web developers I hired have unfortunately left the project hanging and have not disclosed everything to me. I would like to disable their access to my website, GAE, Facebook and Twitter apps. Directions: 1) Google App Engine expert needed to download source code for me. However, my Permission is set as 'Developer'; not 'Owner'. I have never uploaded or handled the code myself. 2) Remove the Owner (i.e., the ex-web developers) from my Permissions list. If not possible, then to perhaps provide alternative solutions to disabling their access to my site. I would rather not resort to copying the source code to a different domain name, if avoidable. 3) My website is linked to social media applications, Facebook and Twitter. I would like to insure that they also have no access to these as well. Thank you!