Volunteer Energy Will not let me out of my contract Michigan

I have been with this company for a year with with in normal gas rates. The past 2 months i have had double and triple my normal pay bills. They have been charging me $1.10 per cubic feet vs comsuners $.39. I asked to be removed from there 30day contract they then said it would take up to 3 months to do this. Now i get the bill for this month using as little heat as possable and they charge me 1.59 a cubic feet 4x times the going rate!!!!!!  So there great rate savings has cost me a extra $2400 in just the last 2 months! Avoid them at all cost!!!If it is to goo to be true then it moree then likely is!!!!