How long it will take to get my refunded money back?

That would depend on the payment method you've used to make the purchase

After requesting for a refund, you may need to wait 48 hours for the process to complete or be approved.

Store credit—It might take up to 48 hours to see the refund in your Apple Account balance.

Mobile phone billing—It might take up to 60 days for the statement to show the refund. Processing time might be affected by your carrier. You can contact your carrier for an update.

All other payment methods—It might take up to 30 days for the statement to show the refund. If you don't see the refund after 30 days, contact your financial institution.

Check the status of a refund for apps or content that you bought from Apple - Apple Support

erum257 Said:

"How long it takes to get the refunded money back?"

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30-Day Wait:

It takes up to 30 days to receive the refund. So, you'll have to wait it out. That's just the way it is :(

For Note:

Finding Out where this All Stands:

For Financial Assistance, Contact Apple Store Support:

You need to contact Apple Support Directly. This is a User-to-User forum. We are all volunteers. So, as you may suspect, no one here has access to that information — and that is a good thing, BTW. That’s why for Financial Assistance, you need to contact Apple Support. They’ll see what’s going on and will run you through the fix.

Apple Contact Info:

• Contact Us - Choose Locations
• Proceed from there, as necessary
• Why the Wait: Phone calls are taking a bit to go through at the moment, due to lots of calls. With the Coronavirus Pandemic, many are at home at the moment, with much time on their hands to contact Apple. So, just stay on the line, and you will get through :)