What do you mean by they "refused"?

For the purchase bonus points with Mypoints, I had to say that chances are I would have to chase my points after the 30 days window had passed. I usually make a note of it and wait for the 30 days. If no points shows up, I will shoot off my "missing points inquiry email" to Mypoints membercare. (You can do it either by sending a direct email or using the hyperlinks provided under your account transaction history under each clickthru). Sometimes it will take a couple of email to repeatedly send them the pruchase/sign-up confirmation email.

To Mypoints credit, they have always honored my requests and posted my pruchase bonus points, even though it would longer than the orginal 30 days window. No complaints, as long as I get my owed points.