The difference in your balance may be due to several factors, such as the wallet being set to display a different currency. By default, your wallet shows the balance in U.S. dollars (USD).
To change the currency in which your balance is displayed, go to your wallet, select the "Change Currency" option, and switch it to the currency in which you made your deposit.
Another possibility, if you deposited cryptocurrency, is a change in the exchange rate, which can cause fluctuations in the displayed balance.