How can I get back my money

I am not fully following what you are asking. If you mean you transferred money from your bank account to Apple and it ended up in your Apple Account balance instead of Apple Cash, normally once funds are in Apple Account balance the only way to get them out again is to spend them, or ask Apple to keep them. Check your Apple Account balance - Apple Support

There are posts (e.g., Accidentally added funds to Apple ID rath… - Apple Community , and this one from an official Apple Community Specialist —> I made a deposit to my Apple account by m… - Apple Community ) claiming that if funds were transferred from Apple Cash or a bank account and none have been spent, Apple might grant a reversal request of the original transfer back to the originating account. This is not mentioned in Apple’s documentation (which, if anything, pretty firmly states the opposite about no “return” of funds), so even if Apple might do this on occasion, they are not so obligated.

In this situation you are asking for a special service and need to speak with a live representative. Click here ➔ Choose your country or region - Official Apple Support Select your country, then a product. If you don't see one that handles your issue then keep experimenting with selections until you reach one that gets you a chat session or a telephone call and get the representative to redirect you. This page has telephone numbers for contacting Apple for support and service ➔ Contact Apple Support - Apple Support Do not use the standard refund request service.

If instead you mean you transferred money to account balance and it was immediately removed, you may still have owed Apple for something and payment gets removed automatically. Personal account balance is used first. Read this article How apps, content, and subscriptions from Apple are billed - Apple Support Apple usually attempts to use your Apple Account balance to cover the full amount. This is at the top of the list always, but isn’t what is referred to as the “primary” payment method.

If you have money in your Apple Account balance, and this payment method is listed on top of your Payment methods for your Apple Account, Apple will use this payment method first, to pay for your apps or other content bought from Apple.

copied from: If you need to change or update your Apple Account payment method - Apple Support