I started playing Team Fortress 2 and ran into the item limit which is a really bad thing because now I can't switch teams during the game when I'm asked whether I volunteer for switching because if I accept, an overlay which can't be closed, is opened. Discarding items doesn't really help. I tried this after experiencing what's described below but if you find new items during the game you're playing, you're shown the overlay, too. Discarding items then, doesn't allow you to dismiss the overlay.
I went to buy some random item from the store but wasn't able to because this message popped up in Steam:
Do I really have to buy some game on Steam and then wait 30 days, just to buy an item in TF2 to get rid of the low item limit and its side effects? Is there a way around this?
I know very little about Steam and created my account for the sole purpose of playing TF2. Sorry if the solution is obvious and I just can't see or find it.
In case it's important: I live in Europe.