Wrong. The Greeks didn't rejected this principle. They never requested the troika to write off their debt. All they asked was for some more time and an extension of the deadlines. They promised the troika that they will make the payments once the economy picks up. It was the troika which refused to make the compromise.
Bollocks. They (the government of Greece) asked for money to pay back what they already owe, and then more. Every fucking day they needed more money. All they asked for was more money, repayment postponed into "the distant future" (Varoufakis).