Hi I've been getting constant calls from 0280490831 and immediate hang ups once I answer the call. A quick search showed that it the number was Optus telemarketing. Is this true? If it is, how do I stop these calls?
As you have posted on mobile you can block this number both on Android and iPhone
I should have added you can out of Optus marketing calls by logging into My Account, clicking on profile and then general marketing.