Apple Store

STEP 1 - Open the App Store application.
STEP 2 - Tap on your App Store Account display picture at the top right corner.
STEP 3 - Tap on the Apple Account section above Game Center account information at the top of your screen.
STEP 4 - Scroll down and tap on "Purchase History".
STEP 5 - This should display your purchase history from the last 90 Days by default.

OPTIONAL:  Tap on "Last 90 Days" and select a year to look at your purchase history from past years.

Google Play Store

ON MOBILE

STEP 1 - Open the Google Play Store app on your device.
STEP 2 - Tap on your profile icon on the top right corner.
STEP 3 - Tap on "Payments & subscriptions".
STEP 4 - Tap on "Budget & history".

ON PC

STEP 1 - Open the Google Play Store on your computer's web browser.
STEP 2 - If required, sign into your Google Play Store account.
STEP 3 - On the top right corner of the screen, click on your profile icon.
STEP 4 - Click and select "Payments & subscriptions".
STEP 5 - In the top menu, select "Budget & order history".

Xsolla

STEP 1 - Open the mailbox of the e-mail that you’ve entered when you’ve paid for your purchase.
STEP 2 - Using your e-mail provider's search function, search for the term "Xsolla".
STEP 3 - Select an e-mail from Xsolla that contains the purchase information you need.