First time doing something on my own and I bottled it, what did I do wrong

This(now blown) outlet is brand new, I attached it to an extension cord, and when I tried to plug it into the socket it popped, and you can see the result- hole on the metal part of the outlet. I didn’t even plug in the electric chainsaw I was planning on the other end.

I connected the wires in a proper order.(as per youtube tutorials)

What could be the culprit, the fix and can I safely use the socket with other devices now ?