Hi. How can I clean my purchase history from Apple store?

You can’t permanently delete, but you can hide...

Hide and unhide iTunes Store, App Store, or iBooks Store purchases - Apple Support

Hide and unhide iTunes Store, App Store, or iBooks Store purchases - Apple Support

This is a user to user help forum. You are not addressing Apple here.

To submit your comments directly to Apple use this link http://www.apple.com/feedback/