Hi @Nyankats ,
Welcome to TPG Community!
We can have our Plan Change Team to assist you on upgrading your NBN plan; however, we cannot pull up an account using your community details.
Kindly private message to us your customer ID or account username along with the registered address, so we can further assist. We also recommend that you include your preferred callback number and time.
Hoping to hear from you soon.
I have also tried to upgrade today and get the same error message. Can you please investigate this?
Also, our linked mobile has a blue screen saying 'downloading' do not turn off target since I last made the request to upgrade NBN plan. Can you please investigate this for me?