You can hide public questions by heading to:

 

Web:

Your profile name > Selling > select the item

Then tap on “Remove question” below the question you want to hide.

 

App:

My Shpock > Selling > select the item

Then tap the 3 dots next to the question you want to remove and tap “Hide”

 

Remember! If the user is spamming or harassing you, you have the option to block or report them.