We’re here to support startups. If you ever have a unique circumstance, write us; we’ll try to be reasonable, in the same fashion that your hosting provider will try to be reasonable if an engineer e.g. fumble fingers a deploy and briefly turns on a larger fleet of servers than they intended.

(It's worth noting, for precision's sake, that a refund is not a chargeback. Chargebacks are when the person who actually owns the credit card calls the bank to complain; they're strictly worse for all parties than simple refunds.)