How to return the stock when an order was not completed within a period of time

Summary:

When a user uses a coupon code and the order remains in a status other than "No Pending Action" for a period of time (for example, 12 hours), the coupon code cannot be used again. How to return that coupon code, so a user can use it again?.When an order remains in a status other than "No Pending Action " for a period of time (for example, 12 hours), no stock is released. How to return stock for all the order items automatically after X hours so that it is available for sale?