Factory keyboard defect - letter "u" - chuwi lapbook se

The manufacturer said that he could not do anything. Windose I can not reinstall sruzu begins sticking buttons - uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu. I turned it off programmatically from under Windows and use a temporary screen keyboard. Does the manufacturer recognize a factory defect?