How long am i suspended?

I suppose you can post this issue here:
forums.xbox.com/.../41.aspx

Posting there will tell you why you were suspended, not how long, unless it's a permanent suspension. To find out how long you've been suspended, try signing into live and it should say "Suspended until ____" and give you the date.

The enforcement site is bugged since a week and is not showing current suspensions.

You can try contacting Xbox support and they can tell you how long your suspension actually is, but they won't have any further information about the suspension because that information would normally be shown on the enforcement site which can be accessed on https://enforcement.xbox.com/

If you want to open a support ticket visit https://support.xbox.com/Contact-Us

Because it is your first ban it most likely only lasts for a couple of days.

For information about your suspension, you'll need to go to
http://enforcement.xbox.com

"thy sandwich needs thou spread"

For information about your suspension, you'll need to go to http://enforcement.xbox.com