Hi there @Annasmobile52. Thanks for posting on Yes Crowd.
If you're noticing your prepaid credit being used up more quickly than usual, we recommend using the available tools we have to monitor and control your usage.
These options are 24/7 and are free to use in Australia:
If you're still needing further assistance on how you credit is being used, we recommend reaching out to our 24x7 Messaging Team via the My Optus App and they'll be able to take a closer look into it for you.
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