Unfortunately, AF's way of handling IRROPS' compensation is ****.
You can find more info in this thread where the OP was also denied compensation over and over. Unfortunately, he had no other solution than going to court.

You could call one of the designated NEBs (National Enforcement Bodies) who handle this sort of problems but I don't know how it works for non-EU citizens.

On the leaflet about pax' rights is a number you can also try if AF won't budge: (32-2) 299 98 96 (normal charges apply from outside EU).

If you're still inside the EU, PM me for the European (tollfree) number.

No experience with said organisations but they might help.

I'm sorry you're in this situation, you're entirely in your right and AF is utter crap with compensation. One wonders why the EU keeps accepting these denials.