If you have completed your work as per the terms and conditions, you are assured to receive your payment. If you are the project manager and the client has any disagreement, you may have a discussion directly with the client to reach a mutually agreeable solution. Other freelancers can sort disputes through the project manager.
In spite of your best efforts, if you are not able to arrive at a solution, please reach us for help at [email protected] so that we can step in and assist both the parties to reach a solution.