In my opinion it is just bad luck\timing on your part. It's no surprise that miners loose value quickly, in order to be competitive you need to be able to respond to competition. I don't think Bitmain ever gave money back, just coupons to entice you to order more product. Perhaps Spoondoolies will do the same. Have you asked them?
when bitmain dropped prices from ~0.87 to ~0.65 overnight due to an obvious disparity between good and bad pricing, they issued coupons for 0.2BTC to the affected buyers from the prior 2-3 days.
that said, caveat emptor. you knew the price and paid it.
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