Bajaj Allianz — tata voltas ac ' conditioning or cooling not working at all

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New Delhi, Delhi, 110091

I have extended ac warranty from bajaj alliance.in these summers, i had lodged 2 complaints still 3rd time i have again registered another complaint. Each time after few days ac stops conditioning. They send ac technicians who charge for servicing the ac and say that ac will now cool properly, however, almost every month or so, it's cooling stops.