@FrustratedToMax, it sounds like you've done all you really can from your end.
I think we're going to need to raise an IT case for this one.
You're welcome to send us private message with your account details.
I'll need your full name, DOB and account number.
There should be a CLEAR CACHE option (for the optus app) in the app settings menu on your phone. Possibly that might help.
Otherwise perhaps there's something OPtus need to fix up with your account details to match them to your phone.
What @petergdownload has suggest could also work!
You can try the following:
Go into Settings > More > Application Manager
Select the My Optus app
Select Clear Data and Clear Cache
Uninstall and reinstall the My Optus app using Mobile DATA only
Open iPhone notes
Type myoptus://clear and then click Done
Click on the link that appears in iPhone notes
Uninstall the My Optus app & restart the phone
Reinstall My Optus app using Mobile DATA only
Hey @FrustratedToMax, you may wish to raise this with Tech Support, although you've indicated they weren't of particular help and so we would need you to send through a private message with the details Dan mentioned above so we can refer it on for you.