Replying to Oakley Lens Warranty?

So, went off a jump, botched my landing, and ended up sliding for a few feet on my face. My nose is scratched, and the inside pane of my crobar's lens in cracked in two places. I've only had them for a few months, so they should be under warranty.

I called oakley, and they tried to charge me $30 for repairs on the entire goggle, or $70 for a new lens. I said I'd call back.

How do I go about getting a new lens sent to me? (for free. duh.)