Specifically for Xpax user, there are various reasons why you might be experiencing this. Please check and eliminate all the below-mentioned issues generally related to this:
1) You subscribed to a different internet plan by accident. To check the internet plan that you have subscribed, please go to the "Prepaid" page and look under the "Internet plan" section to see the internet plan that you have subscribed to. If you have subscribed a different internet plan by accident and want a refund, please contact your mobile operator to check if they allow refunds
2) You have subscribed to other value-added services with your mobile operator and your mobile credit is deducted accordingly. Please contact your mobile operator to check whether you have existing subscriptions that have resulted in a recent deduction of your mobile credit balance If you have subscribed to the right internet plan and you do not have existing mobile subscriptions that might have resulted in deductions from your mobile credit balance, please submit a request and we will be right with you!