You can block a community member on Legiit from communicating with you and also purchasing from you.
To do this, you can navigate to your conversation hub, at this link here: https://legiit.com/messaging/conversations
search the username of the community member you'd like to block, click on the conversation with them, then on the right side of your screen, you will see 3 dots (Pictured below):
From there, just click on "Info" and it will open up a side menu where you will see a "Block" button as shown here:
For help or questions, please contact help@legiit.com or send us a message by clicking the purple support chat bubble on the bottom right side of your screen.
Thank you for using Legiit to get more stuff done!