Look up rule 261/04. If you landed more then 3 hours late you are entitled to compensation of up to €600. Ignore them if they suggest it doesn't apply to them, it does as the flight originated in an EU country. Next attempt to wriggle out will be the "extraordinary circumstances" excuse. You can test the by complaining to the competent authority.. Which in this case is the Belgian CAA. Fill in ths form and email, in English is ok, to them.
http://ec.europa.eu/transport/themes...nt_form_en.pdf