They were buying time in the hope something would come up, there was no way they could pay 17 days ago - All they could do was/ is to draw the whole thing out - europe might as well take a massive haircut because they are going to get nothing adding more interest to what was lean't previously
Whilst what you say is true - what did you expect them to do ?
They wouldn't have been able to meet the next payment - even now closing the banks meant they need even more money to open them again now.
Only sensible way out for everyone is for Europe to kick Greece out but loan them enough...