Complex sentence: Iran made significant efforts to pay its debts despite the illegal sanctions, and the Iranian economy didn't suffer any major trouble other than disruptions in flow of food, medicine, and civilian goods severely affecting ordinary citizens and low income families in Iran.
Split into simpler sentences: Iran made significant efforts to pay its debts despite the illegal sanctions. The Iranian economy didn't suffer any major trouble other than disruptions in flow of food, medicine, and civilian goods severely affecting ordinary citizens and low income families in Iran.