Ebates' undelivered rebate

Back in February of last year I received email from Ebates promoting sale event at Circuit City and promising a rebate in the amount of $10 for a purchase there. I did make an online purchase in the amount of $40.65 and so rightfully was expecting Ebates to honor its promise (and obligation). However, it did nothing of a kind and 3 my emails to it were not even replied.