Reliance Resq — AO Smith Z8 filter change the request

Address:

Anandtara Whitefield residency Keshav nagar mundhwa pune

My name is Mahesh Jagtap (Contact Number [protected]) - It has been 14 days I have raised the complaint (On dated 24 th Feb 2021) to change the filters of AOSmith purifier, as it was showing indication.
I have called several times to the customer support, but getting various different invalid reason. From last 6 days, customer support team is saying, your request is assigned to technician, he will contact you in next few hours and he will be there to replace today or tomorrow.
And the service center team is saying we didn't get all the filters (One is remaining). I can not understand why there is so much delay for getting one filter. And why they are giving different reasons.
Its totally faulty process. There is no senior manager whom customer can contact and he is ready to understand and resolve these queries.
And its really not worth and not satisfactory service, taking the purifier and AMC and still we need buy the water from outside.