In Microsoft Rewards, I get this message saying I'm cool and here's 100 points but when i...

Hello, My name is Jesse. I'm an Independent Advisor and a member of the Microsoft community and I'd love to assist you today.

There is a green tick when you go back from that message and your total points should then increase by 100.

You should have your points. If you go back you should see a green tick next to it somewhere to say its been redeemed and your points will have increased by 100

Here is a quote from the FAQ on the rewards system.

http://rewards.xbox.com/faq/

How do I receive the Microsoft Points I earn through Xbox Live Rewards, and what are Pending Points?

A. Microsoft Points earned through Xbox Live Rewards will be automatically deposited into your Xbox Live account by the 15th and 30th of each month. If your Point total is less than 100, the Points will be held as Pending
Points until a quantity of 100 is reached. Check out the Points Pending tab on your MyRewards page to see your Pending balance. Pending Points will not display in your Total Rewards Points Awarded summary.

So it seems that they are only deposited into your account when you have at least 100 waiting to be deposited.

I completely agree, we dont get the rewards program here in South Africa, yet i get the reward emails and even have about 100 reward points from some where

I was just reading through the FAQ and this is what it said

How do I receive the Microsoft Points I earn through Xbox LIVE Rewards?A. Xbox LIVE Rewards Points equal to or greater than 100 will be automatically deposited into your Xbox LIVE account each month. It may take up to 30 days for the points you
earn to be deposited into your account. If your points total is less than 100, the points will be held as pending until 100 total points are reached and deposited into your account.

I'm guessing you only have 80 points pending, get 20 more and you should get your points soon.