Hi
Since making my booking through Etihad Airways from Adelaide to Abu Dhabi I have unfortunately broken my ankle which required surgery. I am still unable to put weight on the broken ankle and must therefore use crutches or other mobility aids. Etihad airways have advised that they are unable to provide assistance to transfer me from the domestic airport to the international airport. As there are no direct flights from Adelaide to Abu Dhabi, my flight involves first flying to Sydney (arriving at the domestic terminal 2) and then flying out from the international terminal 3 to Abu Dhabi. 
I need someone who can meet me when I land at the Sydney domestic terminal (Adl to Syd flight), can then transport me via a wheelchair or similar (I don't have a wheelchair myself) + bus / train / taxi to the Sydney international terminal (3) and can then assist me getting through the international airport. 
I may also need to book a similar service to meet me in Abu Dhabi and help me through baggage claims, customs etc onto my hotel. 
Can you please advise if the above is possible and if so, how much it would be?