In order to request refunds for crown store purchases one must be able to provide a date for the purchase of specific crown store items. It would be incredibly helpful of this information was viewable by your playerbase. Black Desert Online does it. Guild Wars 2 does it. Final Fantasy XIV does it.
If a prerequisite for feeling confident in our purchases that we know we can get refunds if we are unsatisfied means that we need to provide a date for a specific item, then we need to tools to do so.