Upvote:3
Israel has its own law regarding compensations for delays and cancellations. Here is a summary from Delta. For an arrival of more than 8hr late you're eligible for 3070 NIS. No need to involve EU rules at all.
So just file a written compensation request against their Tel Aviv offices, and if refused, go to a small claims court. Do not waste your time emailing them if they are not cooperating.