Countries can tell their banks to do due diligence before sending money to countries where financial standards are not up to the mark. Due diligence takes time and will delay payment.
You cannot negotiate yourself out of a mess. Why will anyone give up a highly profitable legally binding contract.
The best way is to prove that there was corruption in the deals and call them void. But with iron cast proof that will stand in the international court.
The problem with that...
You are totally free to have any sort of financial rules in your country. The rest of the world has total freedom to make their remittances to you difficult or easy.
Facebook is an American company. The US has designated Hizbul Mujahideen as a terrorist organization. Posts on facebook that glorify members of Hizbul are going to get deleted.
That is internal plus external debt and the linked article itself says that it is 70% of GDP and is coming down as a percentage of GDP
https://www.thenews.com.pk/print/707446-pakistan-s-debt-liabilities-stand-at-106-8pc-of-gdp says that Pakistan's internal plus external debt is 106.8% of GDP...