To be fair, how many visitors/referrals do you send laterooms way?
How much money have you made/made them?
Why would/should a merchant spend any time on an affiliate who doesn't spend any time themselves trying to actively promote their product/services?
I am sure that a merchant the size of laterooms has thousands of affiliates, many of which will be deemed as more important than you, based almost solely on how much revenue they produce.