Having read the numerous negative reviews of Certas, I was tempted not to bother adding any more fuel to the fire but was so incensed by our experience that decided to share. Like many others, ordered through Boiler Juice and waited almost 2 weeks ( in January) to get a short notice mail to inform us of the delivery. Having waited in all day, cleared the garage to give access to the tank, I heard a note dropped through the door and saw the tanker making a speedy exit from our property. No oil was delivered as the tank wasn't 65% visible! Our tank has been in the garage for the last 13 years and with an average of 2 deliveries a year, this has never been an issue. If the driver had bothered to ring the doorbell and speak to us, we would have been able to give him/her clear view of the tank. We contacted Certas immediately and were given a load of gobbldygook which only added to our irritation. It was clear that on a Friday pm the Driver simply couldn't be bothered to make the delivery or provide any service whatsoever. We were also tempted to kick BoilerJuice into touch at the same time but a very sympathetic and skilled Customer Service Representative talked us down. We now have a note on our account that Certas will not be considered for any future deliveries and are awaiting a refund. I suggest other disgruntled 'customers' do the same.