Voltas — ac complaint

I am nitin panchal from vadodara (Gujarat)... I own 4 voltac ac at my home... But one of my new ac is not working since 20 days... I complaint and one of your colleague came to my house n said that theres a problem in p. C. B... And then he checked my bill... And said your machine is still on warranty so will replace the part within 7 to 10 days... But now 20 days has gone... They have not replaced p. C. B not even they have contacted me... I contacted them but not received any proper answer from their side... I also contacted your manager najeeb but i got very bad response and he was very rude... So now i request you to clear this problem... Or else i ll throw ur ac and will not buy any o[censored]r ac and never suggest anyone to buy voltas ac just because of service... I had very worst experience with u guys... Hope u take this seriously and fix the issue... Thank u