Panasonic — complaining about servicing center

Address:

58/11 Barik Para Road, Behala, Kolkata-700034, 700034

On 24/06/18 i brought a window ac from great eastern retail pvt. Ltd.
20, old court house st, lal dighi, b. B. D. Bagh, dalhousie, west bengal 700001 model number: panasonic cu - rs 18uky/1.50 ton
On 9th june, 19 i made a complain, complain number is r[protected], one technician (Ph.[protected]) came for servicing but he broke the wing of my ac during servicing.in that time my old mother was alone at home, she didn't understand what he did, after returning from my office i noticed that. Immediately i informed this to the servicing center, my ac was in warranty period so they told me that they will visit our house the next day. But they didn't. Again i called them and they told that my product is not available, when it will available they will repair my ac. Repeatedly i called to the servicing center on 12/6/19, 22/07/19, 23/07/19, 06/08/19, 19/08/19, but they didn't come. Last day they told me that my product is available now they will come soon but still they didn't come. I don't know what to do now. Its my request to you that please fix my problem, it will be very helpful to me.