If you have already lodged a grievance with CRA on the CGMS portal, its status can be viewed on the CRA portal with the token number of the lodged grievance.
If you are not satisfied with the resolution provided, you can escalate the same to NPS Trust
Important FAQs
How to check the status of my grievance?
Where can I escalate the grievance if not satisfied with resolution or grievance not resolved within TAT?
What is the TAT to resolve an escalated grievance?