Wont work Achievements to reward points

In order to earn credits, your purchases either have to be eligible for a specific offer on the site at the time, or you need at least 1 star level in order to receive VIP rebates.

Gamerscore does not award credits. There have been some offers (like the current RoboRewards offer) where you can earn credits if you first purchase a specific type of game and then earn a specific amount of achievements for that game.

Yep, under game it says unlocked. But if you click tje pop-up after the achievement unlocks it is not showing it in the list with latest achievements. And it wont unlock the rewards points. Noticed it in the past three days.

If you're part of Microsoft Rewards, that program sometimes has an event where you can earn Microsoft Rewards Points by getting Achievements. It runs at least once a year for about a month. The event matches your Achievements up to 10,000; one Rewards Point for every Achievement Point. eg get 2,500 more Gamerscore that month and you get 2,500 Rewards Points.

That's pretty well the only time you can get Rewards Points from Achievements.

Rewards points have been buggy lately especially the one that gives 50 points a day for earning any achievement. It doesnt work.

Rewards points are not the same as gamerscore. The 37k you see on Xbox is your achievement score. The points on Rewards are gained by completing rewards tasks. The achievement score is just for show. It gets you nothing. Your rewards points are the only ones that can be used to acquire things.