upgrade ADSL+ plan

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Level 1a

Hi i wish to upgrade my current ADSL+ plan to the 500GB, $49.99/month plan. I am currently on 50GB/month plan. I do NOT want to upgarde to NBN at the moment. My daughter is in the middle of year 12 online exams and we cant afford to lose/change up internet service.

Assistance very much appreciaetd.

 

kind regards

 

Lalage