UPS called me after refund successful (horror)

I received the package. Got Refund shown on my order details and got confirmation email from amazon.
I thot all things settled, but I just got called by UPS.

What should I do?
Should I pick up or ignore?
What questions will they ask and how should I answer properly?
If I keep ignore their calls, will they give up calling me?

Thanks!!!!!

Pickup and just say I have already spoken to Amazon on this matter and they will be handling things from here on out.

tell them you figured it out

Yes, answer. Just say you have solved the issue and I'm sure that'll be the last time you hear from them.

guys, i receive the item, and have already the refund order, but UPS calls me many times, what i need to do?

tell them to go %%%% themselves

Legally i don't think UPS can do anything unless you tell them that you did some SE or if voluntarily gave them enough evidence to call the police.