What Herkum and moritz said.

Nothing personal, they just have some reason unbeknownced to you why they wanted to let you go, and they don't want to pay more in unemployment fees. Nothing personal, it just costs them more and you and your family's welfare isn't a concern on their balance sheet. Nothing personal, mind you.

The phone call is standard. This happens all the time. Be truthful and get your unemployment benefits so you can do some job hunting and get back on your feet. Good luck.