I'm the administrator of our Moodle site (v. 1.9.6) and though I'm not an expert everything has been going pretty well for the last two years. But two days ago, I realised I couldn't get to the Administration Menu items and every time I click on any of them, I'm redirected to www.orixe.org which in fact is our own former web site address. Since then, I can't do anything as Administrator, although the site seems to go on working: teachers and pupils can log in and work as usual.
Our site is hosted by siteground.com and they told me they had found a suspicious code in index.php but even after deleting it, the problem was still there. They tried restoring backups but to no avail. I'm not an expert on php code so I'm desperate and I don't know what the problem can be and what to do. Can anybody please help me?