Here, the freelancer has turned something in which was definitely not asked for and are now expecting to get paid for something the client doesn’t want.
This is the client's primary opportunity to submit a dispute. However, he must submit this dispute before paying the relevant milestone for it to be accepted; once the milestone is paid, he can no longer get his money back. So clients should take their responsibility to check what the freelancer turns in seriously.
Project-Based Projects
When the client receives something in a milestone they didn’t ask for, they can send it back for revisions. Normally, a freelancer will accept the revisions and there will be no need for a dispute.
If the freelancer does not accept the revisions, the client can file a dispute. Both parties will be invited to demonstrate how the freelancer's work was or wasn’t what was asked for. If ZMZ finds that what the freelancer made could fit within what the client instructed, the freelancer will get paid.
If it is clear that the work could not fit within the client's instructions, the milestone will be canceled and the cost of the milestone (not including the processing fee) will be sent back to the client's account.
In a project-based project, the client can leave whenever he wishes, as long as there are no open milestones. So the client is free to choose to continue the project with the freelancer or not.
Hourly Projects
In an hourly project, there are no revision requests. So when a client doesn't want to pay for the freelancer's work because it's not what he asked for, he should not pay the milestone and submit a dispute.
Again, both parties will be asked to make their case. If the freelancer's work could reasonably fit the instructions he was received, the client will be expected to pay for the work. If not, the client will have the milestone canceled.
A client in this scenario who wants to discontinue his work with the freelancer should end the project as soon as possible, before the freelancer continues developing the project. Otherwise, it's advisable to have the freelancer post milestones more often so the client can see the work as it progresses and be sure that it's more to his liking.