A few weeks ago I lost my phone and did not end up finding it so I bought a new one. However for some reason I thought that if you lost your SIM that you had to get a new number as well. So a week ago I cancelled my number but I now realise that was completely unnecessary and if possible I need it back. Is there any way to get it back? I'd happily pay for it if that's an option.
You can probably get it back. But good luck finding the right person to ask. Try Optus chat.
It's possible that they were too lazy to cancel it for real, so you could try porting it out to Amaysim. (SIMs in Coles)