You could try mailing support@storm8.com. But mind you: with accidentally spending gold, they only help once, if they can help you at all.
I accidentally spent 1,000 gold on 250,000 food, while having 3,000,000 food already, and they could do nothing for me, for I had used my "once ever" help a year earlier. So be carefull when you ask for help. Since then, I always keep my amount of gold under 1,000