I used it on something hard and a pin broke and came out

I stupidly tried to break apart some old brown sugar and pushed my machine to far. This pin came out and now machine makes a strange noise and the head(no idea of the actual name) is loose for want of a better word.

Before I start trying to pry of the aluminum ring like I saw in another guide I would just like to check if anyone knows this model well enough to provide advice on the correct procedure

Thanks in advance