Complaint Review: buyer in eBay

I sold my cellphone in eBay and when i received an email from eBay and PayPal to confirm paid by PayPal, I shipped items for buyer. After few days when the items deliverd to buyer i got an email from PayPal that wrote they charged customer two times and asked man to refund $360 by MoneyGram. I called PayPal and asked them about it but they said we didn't send any email.

then i underestand that buyer is scamer. all email from ebay and PayPal that i got before was fake and I don't know who the buyer could find my email and phone number to send me fake emails and text because when i sold items , the buyer text me to my phone number and aksed for ship items by express service mail. I

I don't know how can I forward fake emails for you.