Three likely scenarios

a) The government keeps going and attempts to find a solution with the UK and Holland on the grounds that "people are against paying these debts". Why would the UK and Holland see that as an argument? Those countries can wait. The IMF loans could wait as well. The government is backed into a corner and has little options but to resign.

b)  The government keeps going and attempts to find a solution with the UK and Holland on which the opposition can agree to. Which is unlikely, because the opposition can wait until things are so tight that it can assume power on a wave of discontent.

c) The government resigns. The current opposition resumes negotiations and quickly finds an "acceptable deal" with minor adjustments which they will take credit for. The new opposition kicks up a storm. Then what? A new national referendum on that deal?

It is really a whole big mess. ...