Mitsubishi Electric India — suffering from services

Address:

Kurukshetra, Haryana, 136118

I have 3 mitsubish elictiric ac in my shop
One is 1.5 and other are 2 tons
In the winter my 2 a/c were out of order, which was repaired again and again by engineers then it repaired after 3 months
Know i complaint to june 13 at toll free no. For some problems and service which was commited at the time of sale no response from ur side
My unit is fully digital and i am lossing my business from a week
If there is no solution i am going to other option