Marq ac by flipkart - MarQ AC

I purchased an MarQ AC in the month of April ****. But this year since July My AC has not been got repaired by the service centres of MarQ despite several complaints in the last one and half month. Matter is that on every complaint authorised engineer do visit the site and check the AC and has chnged the Gas thrice in last one month and charged arround ****/- for the purposes of changing gas and sensor and service charges for every visit but still they are not able to find the fault even they have changed the compressor of the unit but still problem persists after wasting so much money from my pocket for their dumped AC. Even now I have made fifth complaint bu still no visit has been planned by them