Hey yaduyksm,
If you're referring to the Pro Apps bundle outlined here:
Then you'd actually be on the lookout for an email to the email addressed used during checkout.
"After purchasing the Pro Apps Bundle, you’ll receive an email with content codes that can be redeemed on the Mac App Store. Codes are usually delivered within one business day but may occasionally take longer."
If you don't see the email, check your spam folder as well. After locating it, you can redeem the codes like any other code in the Mac App Store:
Redeem a gift card on your Mac
1. Find the 16-digit code on the back of the card. For some gift cards, you might need to peel or gently scratch off the label to see the code.
2. On your Mac, open the App Store.
3. Click your name or the sign-in button in the sidebar.
4. Click Redeem Gift Card.

6. Click Use Camera and follow the instructions on the screen. If you have trouble redeeming the card, enter your code manually.
Can't redeem your gift card?
Cheers!