IT is VERY important you do not attend the JC ,since you have already been inactive a year, if you now bow to their invitation it shows to them that you still look to them as authority over you !!!
Get a letter from your lawyer stating you are in fact legally married . Send it certified to the body of Elders . If it were me I would also send along a note telling them any future discussion of the matter would be considered slander by you.They would not want their names drawn into a law suit ,however you will do what it takes ....