I have paid my child support for four years as required. My ex-wife decided that she would just up and move 500 miles away to Savannah GA. Without informing me that she was doing so. Said she got a big promotion and needed to advance her career. We were divorced in Alabama, I stayed in Birmingham and she moved to Dothan, and now has just up and moved to GA. What are my legal options (support stoppage, reduction etc...)