Get online support
Someone warned me that cancelling credit card is the only way but I did not believe that.
Guess what! I am considering that right now.
Stay away from TPG guys.
https://community.tpg.com.au/t5/Accounts-and-Billing/Cancellation-email-sent-late-March-but-no-respo...
https://community.tpg.com.au/t5/Accounts-and-Billing/CANCELLATION-ADSL-AND-HOMEPHONE-SERVICE/td-p/56...
Kept charging me!!! Nice try...