Pureit / Hindustan Unilever — low filtration

Complaint no. Co[protected] on 8th of july. Till now nobody is bothered to complete the call. Whenever i call the call centre, there are only 3 replies:
1. Sorry for the inconvenience.
2. I will escalate the call
3. My senior will call you in 20 mins.

If senior have to call back, which is not happening, why juniors should answer the call. Every one is sitting under the disguise of corona. Worst service.