Aquaguard not replacing water filters which is already on AMC

Even after repeated complaints, Aquaguard is not replacing filters under AMC, which they agreed to replace the filters on next service.

Called them for service more than 3 thrice and they did not show up for replacing filters.
Recent complaint no: 2007442852.
Allocated to Mr.Jeyagopal
Complaint raised on 20th April.

Previous req: 2007163389.
raised on Mar29.