Whirlpool India — no gas in ac

Address: Plot9a,phase2,gokuldham,near mahithi public school,purshotpuram,sujatha nagar post

Complaint on29march not solved due to mischief approach of service team allocated in my area.he is demanding extra money even after informing that I am AMC customer, and he is deliberately delaying my case since he told that whirlpool doesn't pay any money for gas charging to service team so customer should pay.till today, he has cheated the south team also by giving them false promises that my case will be attended but it was never done.
He is continuously saying lies, false things to me and whirlpool.i got this ac for 21000, paid 10500 for AMC and never got any benefit from this defective AC .since three years, I am suffering .
Pls provide me a new ac or refund full amount as this technician team is useless and un trustable.