We bought jomsocial pro 2010 and for some reason it has stopped working over 20 days ago. this is a disaster as i we have lost lots of money on this i want you to pay me back for this as you have done some sort of update with out telling us!
We don't update sites from our customers. Also, that index.php file is a Joomla! core file, not a JomSocial file. Maybe you updated your J! site and that file is corrupted. To fix it just upload the correct index.php file. That's all.