Welcome to TPG Community!
Your mobile service needs an active mode of payment where we can collect the monthly fee to keep the mobile service active.
You can downgrade your plan to $1 for the meantime until you get back from overseas.
The $1 Pay As You Go plan requires a prepayment of at least $20 then the following month/s will only be charged $1 (if international roaming is disabled).
Please let us know should you have further queries so I can organise a call back to be made from our Mobile Team. Just let us know of your most convenient time to receive a call.