This must be a huge relief for you. Quite honestly, it did not make sense that your eTA was "cancelled". Thanks for the update.Update on eTA situation: I emailed the Sydney visa office and they replied almost straight away letting me know that my eTA has not been cancelled and is still valid. So I’m guessing that the online eTA status checker must have an issue at the moment where it is telling people that their eTA’s have been cancelled even when they have not. So for future reference don’t use the online eTA checker! It does not work and will create unnecessary stress! Thank you everyone for your help!
Have a wonderful holiday