Hey there, MarkKituyi
Welcome to the Microsoft community forums
To access your contacts that are stored onto your Microsoft Account, please go to the people website (Or App) on your device. The App should have an orange background with two white images of people. If you click start > All Applications, it should have people at the side of it.
For the website, simply navigate to https://people.live.com and sign into your Microsoft Account. This can be done using your internet browser. If your using your phone, you may be asked, or directed, to use your people app on the phone.
I hope this helps with your question.
Regards,