Who changes acceptance criteria just 2days before the sprint ends!!!!!!!

Idiots

Then is where you mention that the new acceptance criteria is out of the original scope, everything is a matter of talk

Push it back now or else it can happen again

...the entire development team, with unanimous buy-in from everyone.

Seriously, that's the only time such a change should occur. If your higher ups can force that change on you, then you're not doing proper sprints, and you're not doing scrum.

1. Right click on story
2. Click on 'Move it to the Short Term Backlog'