I ordered a filter replacement. I was informed that the filters would be replaced within 5 business days. No one called me for 6 business days. I called myself, the call center told me that all the masters were sick, but they would contact me. After 5 minutes, I really got a call back, the manager from Krasnogorsk, According to her, three craftsmen were involved in accidents. They can't guarantee me anything, and they can't orient me on the timing of the replacement either...