How to get bonus points corrected?

I recently stayed at a Doubletree for 4 nights - $146/night. Base points were 5840 - no problem so far. But the Q3 bonus points were 7,000 - which makes no sense. I stayed a Sunday night (should be 3X points) and Monday, Tues, Wed night (should be 2X bonus points). Total bonus should be (by my calculations) 13,140 points. Is this correct or am I missing something? If my calculations are correct -who do I contact to get this changed?

This is the third time that the bonus points calculations for Q3 have been incorrect - but they have been relatively small on other stays so I didnt worry about them.

Thanks!