Is this the same girl who you keep having misunderstandings with? It seems to me that your teasing and jokes are falling flat. She's finding you weird instead of amusing.
Also, why are you still teasing her after your other recent efforts at teasing have come off badly? I would have hoped you'd learned your lesson after the last misunderstandings. You're coming across like the kid who pulls pigtails because he doesn't know how to show his fondness in a more appropriate way.
All that being said, I suggest you get some perspective. She's not a girlfriend who you need to stress over - she's just a random who you chat with on the internet. If it's not working, you don't need to block her....just stop contacting her.
Never regret anything that has happened in your life. It cannot be changed, forgotten or undone. So, take it as a lesson learned and move on.