We have been loyal customers for over 40 years with Certas (previously JD Williams)using their boiler care and dd payment scheme.Prior to this week they have been excellent, friendly staff on the phone, prompt replies and a wonderful heating engineer, Leon,who serviced the boiler annually. This month we have tried to top up the tank, impossible to get a human on the telephone ,wasted hours holding on.Having made an order at last they have given us a date and failed to deliver 3 times, giving feeble excuses .Is it a completely different management now, what else would explain the volte-face ?