When you register on CEX.IO, the wallet addresses for every cryptocurrency listed are created for your account.
To find your wallet address on CEX.IO website:
Log in to your account;
Click the Deposit button in the top right-hand corner;
Choose the cryptocurrency you want to find out the wallet address for.
Or:
Log in to your account;
Go to the Finance page;
Click the Deposit button next to the cryptocurrency you want to find out the wallet address for.
To find your wallet address in CEX.IO app:
Log in to your account;
Tap the Wallet menu at the bottom of the screen;
Tap the Deposit button;
Choose the currency you want to find out the wallet address for.
Or:
Log in to your account;
Tap the Wallet menu at the bottom of the screen;
Choose the currency you want to find out the wallet address for;
Tap the Deposit button.
You will see both the wallet address and the QR code. Use the option that is more convenient for you to send the cryptocurrency of your choice to your CEX.IO account.