Hey you (as could say Roger Waters), Yesterday (or 2 days ago, maybe) I bought a figure (an elf priest) by mistake... could I have back my pizzas? In the case it will be no possibile, take it easy.... my fault.
For these kind of issues send a request to support@cardhunter.com together with your username and what you misstakenly purchased. I believe I suggested this in the mp chat at the time, but you might not have seen it.
When it comes to spending pizza - figures, starter packs, treasure hunts - it could ask for a confirmation in case of misclicks.