Service hiccup related to a refill attempt

Occasionally a prepaid refill seems simple in theory but becomes confusing once the code is entered and the balance fails to update as expected. A recent attempt to extend service resulted in a message that claimed success, yet the available minutes and days stayed almost the same. The receipt from the retailer confirms payment, which makes it unclear whether the problem sits on the device, the account, or the refill source. Waiting for service to lapse completely is a stressful thought, especially for someone who relies on that line for family updates or work coordination. How do others collect the right proof and describe the sequence of steps so that support can see exactly where the refill process might have stalled?