I'd pay SriLankan $370 for a biz-class ticket BOM-DXB (random date 3 Dec 17 since I don't know your particulars) and see what favor you can politely cajole out of QR.

You won't want to pay a lawyer when only $1000 (or $370) is the argument except perhaps for no-brainer highly-repetitive cases e.g. EU delayed-flight grievances.