Why i don't get any rewards points

As stated in your other thread, there are no offers to receive credits for renewing gold. That offer ended July 1, 2014.

Support will check your other purchases (keep in mind that in order to receive credits, they either have to be part of a specific offer on the site at the time of purchase or you need at least 1 star level in order to receive VIP rebates), but for the preorder
offer, you have to preorder 3 games and then you'll receive the 15,000 credits. There are no offers to receive 15,000 credits for one preorder at this time.

About the pre-order I need to buy three games, realy?? Omg.

Because I just saw that pre-order a game I recive the 15k points. When I try to contac with the support they said that I need to recive and to start a discussion here in the forum

Hello FBMamedeS,

You can earn Xbox Live Rewards Credit in two ways:

1. By finishing the offers located on the MyMissions page at
https://rewards.xbox.com/mymissions/ .

-or-

2. For non-offer purchases, you can earn Credits by earning a one star MyVIP level through purchasing at least $300 USD or regional equivalent of eligible content. After you receive your first star you will begin to earn a percentage of your eligible purchases
back as payback Rewards Credit. Pre-orders, in-game consumables, and subscriptions are not eligible for MyVIP.

The pre-order offer you refer to is the Games on Demand offer. However, that offer requires the pre-order purchase of three eligible titles during the offer period in order to complete the offer and receive the Credits. Since you only had 1 out of 3 purchases,
you did not complete that offer.

Yes. It's the Games on Demand punchcard. for punchcard offers you usually have to purhcase x amount of games before you receive the credits. For that offer, you have to preorder 3 of the eligible games.