Like GeenStijl, you can not delete your Dumpert account. Requests are not responded. See also https://www.accountkiller.com/en/substance-account-deleting
Please note that AccountKiller.com is not associated with the business listed on this page. AccountKiller provides easy-to-understand instructions and guides on how to cancel charges and relationships from the list of businesses on our site, we have no affiliation with these businesses.