Log in to your Twibbonize account. Forgot how to log in? Learn here.
Go to your Profile Page, then click the Collection tab.
Hover your cursor on the Collection you want to delete until you find the [...] icon. Click that icon.
Select "Delete".
A confirmation message will appear, asking if you’re sure you want to delete the Collection. Click "Delete Collection" to permanently delete the Collection.
Your Collection is deleted.
Remember that this action is permanent and cannot be undone, so make sure you are already sure to delete your Collection before making any actions.