Voltas — Service technician doubt full behavior and not action on complaint

Address:

A 1/26, 1st Floor whs marble market kirti nagar new delhi

I bought inverter split ac 1.5 ton on 1 march 2020 from Shiv electronics, Kirari Chowk. On 20 April 2023, a complaint was lodged for the problem of not cooling. Voltas tecnician aakash came on 27th April. After checking he told that all the parts including PCB are correct. R 32 has filling. He took a visit charge of Rs.590. After that, despite complaining several times, the tecnician talks on the phone itself and cancels the service request saying that the customer is not telling the OTP. I am very much worried. His behavior is very doubt full.