You may want to peruse the Contract of Carriage and see if your delay rose to the level where you should have received some amenities or services. See para. G on page 47, it might be pertinent to your situation.

Since there was no communication with you regarding the delay, you have no way of knowing if any of the "exception" situations kicked in. If, based upon your circumstances, you believe the exceptions did not apply, it might be worthwhile to contact Customer Care and let them know. Who knows, maybe you'll accrue more than 2,000 miles and an apology brochure!