Yes there is a way, you will have to contact support for that. Sometimes, but not always Lord Oberon can assist you. 

Here is the link

https://plariumsupport.zendesk.com/hc/en-us/requests/new

make sure you have screenshot documenting elections of the new Marshal for example

Votes in league chat

Players response showing they need a new marshal

raises of no confidence in Marshals from several players in the league

You have to give a great deal of evidence why the marshal should be ousted, and evidence showing that a league support a certain player to be a marshal in his stead.

But bear in mind that in event that the old Marshal returns and demand his league back, Plarium reserves the right to give his league back.