First, I'm sorry for the delayed response.
As to your question, we don't have recommendations for who you could hire to upgrade or install JFBConnect properly. In general, it's simply not necessary. Most users are able to go through our documentation or use this support area for any questions or issues that may arise.
If you don't have the time or inclination to read our documentation, which is intended for end-users and not necessarily developers, anyone you find that's able to work on Joomla sites should easily be able to help with JFBConnect's configuration.
I hope that helps, but again, if you're running into specific issues, just let us know what they are and we'll gladly help however we can.
Thanks,
Alex