A. 1. Review your usage: Check your account details in the app to see if there are any subscriptions or services that may be consuming your balance without your knowledge. 2. Disable auto-renewal: If you find any subscriptions, disable auto-renewal or cancel them to prevent further deductions. 3. Contact customer service: If you cannot identify the cause of the balance depletion, reach out to Movistar's customer service through the app or website to inquire about any unexplained charges. 4. Monitor your balance regularly: Keep an eye on your balance to catch any unusual activity early on.