Upgraded plan but both plans still active after cycle ended

[Ausmiun]

I upgraded my data only plan from 200 to 500gig. Now, in the new billing cycle I still have both active. Why isn't the 200G cancelled? I don't want to pay for it as I upgraded it!

[Tigers1719]

@Ausmiun As per the warning message on the side of the page Note: Yes Crowd cannot access or view customer accounts/orders.
Please message Optus Support via the My Optus App. If you don't have access to the My Optus app and you have a social media account, please then send a PM to Optus on Facebook or a DM on Twitter  with the details for further assistance mentioning you don't have access to the My Optus app.

[petergdownload]

First month bills after a change of plan can be messy. Possibly your bill is being prorated?

I would wait for the second bill in which Optus will probably get around to backdating any credit after they shut your old service down etc.