My initial thought is why did you spend £700 on phone calls?

Skype or similar is your friend.

The good news is under UK261 legislation you’re entitled to two free phone calls in the event of a lengthy delay, so you should be able to get the two most expensive calls refunded once you submit your phone bill.

You’re also entitled to claim for food and non-alcoholic drinks you paid for yourself during the delay.

And have you put in a claim for delay compensation? You should be entitled to £520.