Is there any precedent to have a purchase made with crystals refunded?

I've spent way too much on this game. I once bought Mk4 stun gun salvage instead of Mk5 with crystals I bought. Messaged support and asked if they could revert the obvious mistake- I had thousands of Mk4 salvage already.

Support said no. I said I'll never spend another penny on this game, and I stuck to it.

Those Stunnies saved me hundreds of dollars at this point.