I can see refunding the cost of the unit since you now decide that you don'e want it, it does not suit your needs. But technically, if it was me, I would either refund the purchase price (not shipping), or i would pay for both shipping from your place back to Astak, and send you the right colour free shipping.
I would not refund both the purchase price and shipping. You would be able to have one or the other, not both. But that's up to Astak, not me. I do wish you luck.
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