As stated, ask for a payment plan and then STICK TO IT! We were on one, and an auto payment did not go through (we didn't know about it) and they turned the power off. My power company is not required to send disconnect notices to those on payment plans. They WILL turn you off and then you have to pay the full balance to get it back on. It was $500+ for us, and we live in an area with a high water table meaning we have a sump pump. No power=flooded basement.
Check with your counties human services and see what help options you can get. If your in the USA and a Vet, I know for a fact there is a program via your local veteran affairs commission. Also check with large churches. You will not get help if your don't ask.
Good luck!
What is this VAC program you speak of? Is it a regional thing, is there an age/monetary restrictions. I am a combat vet and would be interested in this. I could always save more money.