The last two service calls were not announced beforehand. Nobody called to inform us of the date or time of the visit. We were about to leave at 5 PM for a dinner engagement when the technician showed up at 4:45. This is unacceptable. Please call in advance. In addition, the technician usually emails us a record of what he did. This time were received no record at all, either paper or email. This represents a sharp decline in service quality.