when did u buy the ticket, and what was the EGP at that time?
Since EGP has devalued further, you are losing FX on top of 10% and the one-way fare.

you have only flown 2 sectors and not anymore?

I think it is best to fly as many sectors as possible and be done.

just looking at your old post. the LONE was purchased in oct 16 when USD was 8 EGP.

The current rate is 18 EGP, and even if there is a refund, it would be in EGP. off the head, you would lose over half the value?