If a Gig or Contest creator isn’t happy with the work provided, they have every right to close the Gig or Contest by way of negotiation, and offer either no or some money for time put in. As artistic differences are common, it is expected that the employee understands that paying for something they can’t or won’t use is illogical. However, the employee should understand that they can then use the work they did to sell on Vocalizr’s Marketplace, or for another Gig or Contest.
Why? You ask for a picture of a cat, but you received a picture of a dog. Would you still put it on your wall? Tip: Not everything is lost if they don’t like what you’ve done - use it for something else or sell it.