Fined for completed work.

I have all the correspondence. I completed the work requested, photographed it and sent it to the board immediately. I told them I would not have the work done by their due date because it was winter. I indicated the work would be done after Mothers Day 2021 when Home Depot were had stock of products. They fined me $250. I appealed, reiterating the realistic time frame and letting them know that during the period of April 1 to mid June we had a family crisis. My mother died and I couldn’t leave her side. These bastards said they didn’t care and fined me any way. What are my options? Or will it cost too much to battle them. They have since sent me another fine for not paying the first – $500.