Yes you can, but not in the Answers section. If you haven't done so already, contact the italki support team. The email address is on this page (right hand side): http://support.italki.com/home In your case, it sounds like a glitch in the system, so just write to them and ask what has happened on their side.

Write a letter to the support people.Something weird is happening because I see some comments I wrote to people have disappeared! I already answered you once and now it has gone! Did you see my previous answer?