I’m back home in the UK after being in Australia for 2 years. I brought an iPhone with Telstra whilst out there. Now I’m back I need to unlock my phone. I have tried calling the international number but no answer. I’ve tried the 24/7 help line but it’s not connecting. Does anyone have any other suggestions or advice for me please. This is urgent as I need to make calls for my work. Thankyou for your help.