equal owner partner not covering end

[OUSMANE BANGOURA]

hello everyone I am seeking advice bout a 50/50 ownership of a property in new jersey, what are some of the legal avenues available when someone refuses to pay mortgage even though they have collecting section 8 rent?
Things to note here, my name is only on the deed of the house not the mortgage also received a letter from the bank stating we need to pay the last three months by the end of February to avoid the start of foreclosure proceedings. 
thanks much for any advice