I am being scammed.

I received an E-Mail stating that a bill for $489.00 had been paid by PayPal for me. I called the phone # provided and talked with someone who stated that he was a PayPal Rep and would put a freeze on the PayPal account for 48hours. He said he needed for me to turn over my computer to him so he could stop the scammers from getting this money from PayPal and stop any future orders from the scammers. I don't know what to do. Can someone help me?