QLD Double Lane Roundabout Car Accident

[t_3248]

I was on a multi lane roundalent (2 lanes) on the outer left lane wanting to go straight as on the marking it said the left lane can be used to exit left or straight. The car on my right lane entered the roundabout, therefore assuming it was after I entered the roundabout with them. I have now entered and pretty much passed the first exit, however the car on the right lane was going much faster than me and then another car behind on the right lane trying to exit hit my car on the side. The other driver hit my rear driver side door and scraped all the way to my front fender. They didn't honk and considering the damages I don't think they slowed down at all. They are claiming I am at fault for this accident saying I didn't give way properly, who is at fault here?