From what you described, it sounds like the motor is spinning but the output shaft of the gearbox is not. If this is the case, something could have been damaged inside the gearbox. You could try opening the gearbox to see if you find what is causing the problem, but it is unlikely you would be able to fix it if there is a damaged or stripped gear.
If you need to order a replacement and you are in a hurry, you could select a rushed shipping method to get the motor faster. As long as you place the order before 2:00 PM Pacific Time on a business day, your order will ship the same day. If you are in a different country, you might try seeing if one of our distributors near you carries a replacement to try to reduce shipping time: