Mircrowave 1 month old faulty!

I purchased a microwave on the 03/03/2018 and the microwave is faulty! I purchased it at GAME and was told that the device needs to go for repairs and will take 12 working days! The device is only a month old and I work all day so the microwave is hardly used. I mailed Hisense 24 hours ago and have not had a response. This is extremely poor after sales service. I just this month purchased one of your washing machines and last year a fridge. This after sales service seriously makes me judge my decision in your products! Contact number ********** 747