It doesn't matter what the cost is.
Your warranty is with ocuk... Therfore its their duty to replace it. All they have done is take the liability away from themselves.
I'd personally be calling and asking for an immediate replacement.
The contract is with OCUK, but if OCUK's process is to send the card to the manufacturer then there's nothing wrong with that. They are under no obligation this long after purchase to simply replace on the spot. They will only need to replace if Gigabyte take too long to return a working card, and I'm sure they'll do that if it gets to that point. Hopefully for OP Gigabyte will have the card back in a couple weeks and all will be well.