Uber is blaming a computer glitch for overcharging a “handful” of customers, including one Philadelphia woman whose bank ultimately blocked an attempt to charge her more than $28,000 for a ride. The woman first got an email from the popular ride-sharing service warning that her personal financial information had been hacked. Six days later, Uber sent another email telling her that the hacking notice was a mistake and that their engineering team was aware of the error. The San Francisco-based company now says its engineers are working to ensure that a similar glitch doesn’t happen again. Uber confirmed that the woman’s bank account was never actually charged the $28,639.14, but a hold for that amount was briefly placed on her account before the bank stopped it.