Duplicate Title purchase

Hi everyone! Back when the Kickstarter was going I purchased the The #MadeMoreMST3K DELUXE Collection, which is awesome by the way. Fast forward to a few days ago and I was wanting to see some Bart Fargo action, so I went to the Gizmoplex and bought Danger!! Death Ray, having completely forgotten that it is in the collection I already have. Support advised that I am unable to get a refund. What options are there? Can I gift it to another Mystie? Is there a way to prevent duplicate purchases like the one I made?