I paid $X for a token, but the tokens I received are worth less than $X. Can I get a refund?

Updated 

We understand that token prices can fluctuate. Before you complete your purchase, we provide an estimate of the number & value of tokens you'll receive and give a warning about potential value changes due to market fluctuations. Because token values can change rapidly, we are unable to offer refunds if the tokens you receive turn out to be worth less than the amount you paid. Please review the estimated value and associated warnings carefully before finalizing your transaction.