Not often I agree with you MostBlunted - but this is exactly how I feel about EA in general on steam. I think the entire idea came from a good place - but it is really have just become an excuse to release unfinished games. If I see an EA title these days I just wishlist it and forget about it.
However - in regard to this thread. You aren't going to get a refund. It is as simple as that - you can't use a product for X many hundreds of hours and then refund it a year later. Even if you had bought a washing machine and it broke within a year - you would get a replacement not a refund.
You would be better spent either demanding the issue be fixed or just moving on - this 'refund' line of thinking is just dead weight.