Aquacare Ion Exacense — Water purifier

I bought aquacare insurance amc for 2 years for my aquaguard uv water purifier in january 2019 at bangalore from the field personnel of aqucare
Ion exacense, who had visited home telling that he is from aquaguard. I paid rs 8550 towards amc for 2 years. According to amc, they were supposed to provide service, once in 4 months. But it was not done. I called and asked them to do the service and the next service but they didn't send any one and the 2nd service was on 11.6.2020. Later no one turned up for service. When i called, i was told that the service center is nearby and they will send. Repeated calls to their 24 hrs help line has only elicited false promises of service within next 48 hrs but in reality nothing has happened. When a complaint was booked, there was no confirmation message from their side. Aquacare is fooling several customers like me, telling that they are from aquaguard. Please let me know as to get back my money and also how to prevent them from fooling people