It would not be paypal customer services that you called it would be a FAKE number pretending to be paypal customer services. The number shows up when you use 'google' to find paypals number OR a scammer has posted a thread in this forum.
That is why paypal NEVER post their phone number on this forum as scammers post scam numbers on here as well.
Most times these threads get reported and removed but some slip through.
The only way to get the REAL paypal customer services number is via help / contact bottom left of paypal pages and scrolling down past the FAQ to the 'call us' option to phone them. If you think about it why would paypal ask you to buy or cards to answer your question or issue you a refund etc?
Advice is voluntary. Kudos / Solution appreciated.