Alternately, you could stop by any Next Store or call 0333 777 8800* and verify whether you have a balance. Did the information contained that was provided in this piece helpful and clear? Below are a few steps you can take to safeguard yourself and make sure that your gift cards will keep the intended value. Make contact with vendors or stores direct: Always check your balances of your gift cards through the official websites or via customer services of the company that issued your gift card..