Update : Got a call from technical team ,And they have refused to give proportional refund or to remove Capping till lockdown ( gave reason such as congestion for speed capping, also said will even further continue speed limiting after 3 may if lockdown doesn't end ).
As such the customer needs to pay for full tariff for their lack of infrastructure/ unethical practices. So much in the name of service and quality.
Please be advised while choosing such ISPs