Voltas — Faulty window ac, no response from service center

Address: 400076

We purchased a voltas window AC from Amazon 2 weeks ago. There was a problem with the AC and we called Amazon. They informed us that the service executive from Voltas will have to check the piece and certify that it is faulty so that Amazon can replace. We lodged a complaint with the service center and the person visited and checked the AC. He said there is a problem but will need to observe for a week more. Now since more than a week we are registering complaint with their service center. at the end of the day we get a message that 'our complaint has been cancelled since it was resolved on the phone" This non sense has been going on and the escalation number mentioned on their website of one Mr Ravindra Phadke is always switched off. Amazon cannot do anything till these guys don't address the issue.