continue using Jio services. There is additional information about EAN-8 here. The code is smaller because it drops out zeros which would otherwise occur in a symbol. UPC version B is a special version originally developed to handle the National Drug Code and National Health Related Items Code.
Now email these details to stating your problem of coupon showing redeemed. There is a good explanation of Zero Suppression at the Infinity Graphics site with a table that shows how a Version A number may be reduced to Version E if the Numbering System Character is "0". GS1-US (formally called Uniform Code Council) has a home page that provides a catalog of information they sell and an electronic version of their newsletter. Use the JIO sim number or registered email address as your JIO username and the password used during sign up to sign. The first digit is a product type code.