HELP with heating / air conditioning service: So we have had repeated misdiagnoses of our older oil burner/ furnace, erroneous or incomplete service calls and now where is the oil delivery from Griffith Energy Services?? I've sunk many hundreds of dollars in service calls, had to replace my oil tank, parts they forgot to change during our tune-up. Now we have oily, sooty black clouds coming out of the vent on the furnace. Griffith Energy is horrible. I really need a reliable and heating/ cooling company. I'd like to explore a few of them , set up a heating/ AC budget and get some reliable service without repeated failures in the middle of the night. Recommendations please??? DTR