I graduated from West Bengal, India in March 2019

I graduated from West Bengal, India in March 2019. My GMC registration is stuck because they have found out that my Indian Permanent registration was issued on 30.5.2019 but I started housestaffship on 23.03.2019. They are taking this as a non registered practice.
What should I do? How do I make them believe that I had Provisional Registration at that time?
Thanks in advance.

They generally give a GEN 1 form which has to be filled signed and stamped by either your supervisor or internship incharge/dean of hospital

The form states that those few days/months that you were working you had provisional registration and were eligible to work