Is it acceptable for a Gig to accept an order to provide a certain amount of twitter followers and then a week later and 5 days before the gig is due to be completed, come back and say that he is now going provide half that number
It may not be acceptable. All you can do is request mutual cancellation.
It’s not acceptable. Only buyers have the right to change the rules of the game after it started :)) They also have the right to ask for stuff that they haven’t paid for… :)) Yhaaa