Waiting for New Milestone/Ghosted by client

[#1]

I did some work for a client. I have been waiting for  a new milestone for the remainder of the work, however, client has ghosted me. I have reached out several times with no response.

How do I get the job closed and get payment?  

Thanks

[#2]

To get payment was prefunded use "submit milestone" option. You will be paid after 14 days. Then close contract yourself or leave it as-is.