Would definitely recommend having a chat to your careers counsellor at school! They should be an expert in helping out with cases such as these
So, I think you have a few options. One of them being, have a look at and put down other universities - if I'm not mistaken, some require any Maths, instead of Maths Methods. Pretty sure Vic Uni does this. But, I'd probably only lean towards doing this if you're actually set on doing Engineering
Another option is to start a different course, and then after a semester/year, if you're still keen on doing Engineering, transfer over (provided you've completed the necessary pre-reqs).
I think a number of universities also offer a diploma program or something similar, from which you can transfer/move into the Bachelor's degree when you've finished.
There's also the option of doing another degree (eg: Science), then completing Engineering as a post-graduate course.
Really, there's a fair few options, all with their own benefits and risks. I think you'd really benefit from speaking to your careers counsellor, as they'll more than likely be able to give you the best advice.
All the best
