I have a fanatec gt3 rs v2, had nothing but excellent support when things have gone wrong. I also have the CSPs V1, all brought about 3 and a half years ago.
I think in that time I have had a non support question seemingly go in answered, it was relating to a sale ... So found that odd.
But I have nothing but respect for the help I have had, yes I do get the feeling they are not the biggest corporation (that has its own set of problems), but they do care about their products and that is the feeling I get. I have heard bad things about every single company, nature of the internet. Do as much research as you can, read through to try and make sense of what will be best support wise.
I would choose Fanatec again, but then I know what I am getting and have had good support

everyone has their own experiences.
To be honest, I would find out which support will be best in Australia, if it is logitech then get that wheel
I have also heard good things about the the t500rs, I don't think you will be disappointed with any of those three, so look at support, because each can go wrong and hours of use will mean at some point you will probably need to use it / rely on it.
Sorry to hear you had a bad experience guy...