The boiler maintenance service is bad: 5 months la...

The boiler maintenance service is bad: 5 months late on the scheduled date, endless reminders with half an hour waiting on the phone, operators who ensure that you will be called back after a few hours (and you go on days without this happening), appointments fixed and then skipped without any warning for "problems with the appointment registration system that did not work" ... for a service already paid in the bill and thus not provided.