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Hi @jadebishop98 ,
You may update your payment details to pay online: Update Credit Card or Direct Debit payment details or Re-try a Failed Payment securely online
If you are still having issues, please send us a private message with your TPG customer ID, username and complete address so we can pull up the account and arrange one of our account specialists to contact you for further assistance.
To send a PM, please refer to this link: How do I private message (PM) in the community