Hi! I was just wondering, if I can block people here. So they can't write me anymore or buy something from me or something like that. Thanks in advance!! Jai

You may block people here...

Yeah, here. Just type in their name and hit enter.

Personal-Mail-Blocklist New Layout would be Interact-sMail-Blocklist

Thank you very much!

Blocking people won't prevent them from buying from your store. I think you need to do something else to prevent them from giving you anything via Arctic Frost, but not sure what.