My app purchases are not shown on my gift card transaction history?

Hello! I have purchased two apps, Moviepro and Vidpro, from the app developer Deepak Sharma. The apps work just fine, and I was able to purchase and use them successfully. However, my purchases are not shown on my visa gift card transaction history. They are not in my credit card (not gift) history either. I have never linked or provided my cred card information in my phone. I have only used my visa gift card and nothing else. I do not know why the purchases are not shown on my gift card at all. The amount of money in my gift card is the same amount before my purchases. Also, there are not pending authorization either. I do not know what to do.... Is this a glitch? Should I be worried? How do I know how much I actually have in my gift card?