+0
The client was not contactable and visit to the registered address didn’t yield any positive outcome as the client has shifted to a new location. Through online Google search Nitin Arora got a lead that she is a doctor & has been running an eye care centre in Sikkim. It became more challenging to trace her online, as the search result was showing her name associated with hospitals from different cities. After, a rigorous search on Google, Nitin Arora got her brother’s contact number, who gave him the client’s contact details. Although he got the number, but it took another 20 days follow-up to make her agree to meet him. But, at last she agreed to give consent for documents.
+1
This is a bit stiff, unclear, and not always correct grammatically. Let me give you how I would word it (American style) and you can reply if you want any further information:

The client could not be contacted and a visit to her registered address was unhelpful as she had moved to a new location. Through an online Google search, Nitin Arora discovered that she is a doctor and has been running an eye care center in Sikkim. It became more challenging to trace her online because the search results showed that her name was associated with hospitals in different cities. After a rigorous search on Google, Nitin Arora got a contact number for her brother, who gave him the client’s contact details. It took another 20 days follow-up before she would agree to meet him. However she is now willing to approve the documents. [This last sentence is a guess because it is not clear what you want the client to do.]
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