Viomi V5 Robot Vacuum Cleaner Continual Gray Screen, No Map Function

When I use my Xiaomi V5 robot vacuum for the first time, it doesn't make a map, but it does save it to my account. But functions like "start room" and "select area" don't work, and it keeps telling me to clean for mapping. I've tried to run it 3–4 times after cleaning it, but the device never gives me any errors or warnings or stops working. It says that the mapping process is done, but the main screen stays gray. I actually recommend that you don't buy this product because it seems like a waste of money. I went to an authorized service shop for Sunny, but they weren't much help. In Turkey, all home internet speeds are 2.4 GHz, and my neighbors who use the Viomi V2 or Xiaomi mob 2 with the same internet connection have no problems. I'm very regretful I bought this item from Vatan Bilgisayar. The device says that after 4 days it will have made a map, but it doesn't, and the room selection feature doesn't work either. Even refunds and exchanges are not possible. If I have to, I will complain to the Consumer Rights Board.