i was going to port my prepaid  plan from  Optus to TPG sim only mobile. i have received the SIM card from Tpg  but after activation I received an email stating my porting has failed .  Because of mismatch in date of birth or/and possibly email. i arrived in Australlia about 6mths ago  with a few friends and cannot write or read too much English and my friend help me to purchase a SIM card from Optus at the airport. I have been using that card since then, but I could not update the date of birth or email because I don't know exactly what my friend wrote on the application form.  Looks like I have to stay with Optus because I can't get my date of birth corrected.  How can I cancel my Tpg sim only mobile.  I don't want Tpg to continue charging me.  Someone has help me to write this question, I am afraid to ring because I can't understand or speak clearly with the person on the phone.   Thks  I need this fixed quickly, it shouldn't be this difficult. I'm very disappointed and I really don't want to have to cancel all this but have no other alternative.  ... View more