Scammer claiming to be from PAYPAL, advising me that I had been a victim of a scam

Claimed to be from PAYPAL advising of an unauthorised purchase, tried to convince me by providing details of my finances, including the last 4 digits of my credit card and my address. The address details were from 15 years ago no longer attached to my paypal account. Caller asked what i needed from him to make me believe he was form paypal, I asked him to confirm my current primary address in my paypal account, he provided the same incorrect very old address which was incorrect. I asked for a reference number for me to call paypal directly to confirm the validity of the call...he refused.