ION EXACENSE pvt LTD - Water Filter

We have taken AMC with ION Exacense (valid from ** July **** to ** July ****) for servicing the water filter. The filter is not working correctly since Feb **** and has faced problem thrice since then. When I asked them to replace the filter in Feb and March ****, the technician was reluctant and told me that he cannot replace it as we have replaced it recently. After many discussions, they replaced the filter both in Feb and March **** which has come to repair again. They have not replaced the right filter or they have not serviced the water purifier properly. The water is leaking and has sent all the videos and photographs both in Feb and March **** including now from ** May **** onwards. I have to follow up every day requesting them for service of the filter/purifier and get a response that the technician will visit tomorrow. I'm attaching all the videos of water leakage, email follow-up, message, and calls on the toll-free number, and manager's number. They don't respond to the calls, in case if they respond, either they are rude or responds' Technician will visit tomorrow'. They have used words like 'Do you have common sense'. We need the complete refund of the AMC as they are not doing any servicing and not responding to my calls.