Dear management Good afternoon. There is no temperature adjustment in the heater. I've been contacting your company for more than one and half months. The issue is still not solved and no one reply to my email. The receptionist keeps telling me manager will call me back but nobody call me back so far after multi phone calls. The person didn't even leave his or her name. The receptionist didn't leave name either due to so called personal reason. It is really a terrible service. Your management need to know how your staffs deal with customers as it is not good for your company development.