Reliance Resq — Water purifier service delayed for a month.

We purchased the Havells water purifier from reliance digital and also purchased the extended Resq coverage as AMC, however we have been following up for more than a month now via mail and calls to the service center for the change of the filter under the Resq plan. Every time the team says that it will be resolved in 24 hours, but the issue is open for almost a month now. Only response they give is it will get addressed. After multiple mails and follow ups also the issue is still not resolved.