Thanks for raising this with us.
We're sorry to hear you're experiencing issues with your landline service after migrating to NBN.
Since we don't have access to customer accounts, we're unable to assist here on this public forum, apologies.
We recommend messaging us via the My Optus App. The team is available 24/7 and are ready to assist customers as quickly as possible.
Did we answer your question? Please mark it as a Accepted Solution and if you see something that was helpful to you or the rest of the community, giving a Kudos is only a click away.