Cleaning after the cleaners
They came twice to clean the radiators and the heating system from the inside. First time, they emptied the gross and unsanitary water from the system into my shower (!), second time into my washing machine's evacuation. This wouldn't have been an issue, had they reconnected the pipe of the machine once finished. But they didn't. So not only was I forced to clean my shower thoroughly (mosaic tiles...), but also spend extra hours drying the floor in my kitchen, washroom and hallway.. I paid 985 euros for this (+3 new valves).. Never again.
