Missing Fuel

I was having no problems with getting fuel until I started to buy FV Cash. Now that I have expanded and purchased combine, tractors, seeders, and harvesters I don't get any more fuel. I spend hours going to my neighbors just like I did before, but now, anytime I'm to get fuel I go back to my gift box and no fuel. I noticed on the forums that there are 384 posts on fuel problems and there all complaints not being addressed. Zynga are you ripping us off? I'm spending good money and now I have no fuel to use the equipment. I need help to fix this problem. Your response to this matter is necessary. Regards, VLouise