I'd take it back and put my hand out waiting for my money back. Other option I 'might' settle for is them coming to get it and return it to me in perfect working order, 100% clean and shiny like a ''NEW' bike should be.
Any balk from them, inform them you'll see them in court, they don't want that bad press. NO WAY would I spend my money,time,wear and tear hauling it back to them, this is 100% 'on them', don't let them get away with screwing you over.
