I made a formal complaint over the phone - which took me 40 minutes to get through to...and then I was transferred (by someone who was totally lost) to another departmewnt which means I was on hold for another 34 minutes. (LOL) So whilst on my journey to make a complaint, I was able to add to my list of complaints.
Optus is literally the worst service company. I've never experienced poorer service.
They actually don't have an email for complaints - most likely because it'll reach it's storage limit within a day.
Most likely optus will do nothing about the constructive feedback I took the time to provide them with because optiu doesn't really care about their customers.
I will never be a customer of theirs. Ever.