How do i block a seller they're constantly asking me to revise the feedback when I've said no

[lutho1248]

This seller keeps harrasing me on a few of their account every day 4 times a day they're asking me to revise their feedback and saying stuff like we're depressed ur a bad buyer and we're regretting selling to u all cause i complained to them about a broken item and they didn't help me so now they're harrasing me how do i block them? Or stop them as im getting constant emails from ebay from them and it's really bringing me down 

[ruby*tuesday]

You can't Block Sellers only Buyers. Just ignore him he will soon get over it.

[plpmr]

Adding to ruby*tuesday advice -

of the 12 feedback you have left in the past month 9 are negative – have you opened cases?

This can help to shut up bad sellers.