Take a a while to find a bounced payment.
Imagine you take thousands of seprrate deposits per day. Then imagine you pay out hundreds of people a day. Then imagine you use 20 different payment options for this, and cards are done woth 3 different companies depending on your location.
Then work out that the banks take a random amount of time processing a refund so you have to look manually. Then on top work out that they won’t have your transaction ID to manually search as the bank will have provided a different one.
Once someone has a look for you yes it may take a few hours. But then having a person free to do that is the problem. Busy place to work in payments.
It’ll come back to you. Follow the ask gamblers advice above to get them to move faster.