How can an unexplained excess property extent be verified from official land records?

What is the context that you are concerned with the extent of  neighbour's property?

It would be better to be brief and specific to seek obligation of experts on this platform.

My specific problem is this:

The original Parent Patta/Parent record shows only 5 cents. However, the subsequent registered documents relating to the same parent property together show an excess of approximately 97 sq.ft. over the original 5-cent extent.

I raised a petition with the Registration Department requesting verification of the original records and the source of this excess extent, but the Registration Office has not provided any answer or clarification.

After this, the Revenue/Survey records have also become a concern. The new TSLR appears to show a further excess of approximately 39 sq.ft. compared with the extent that should be supported by the parent records and the registered documents.

In other words, there appears to be a chain of discrepancy:

Original Parent extent: 5 cents → Registered documents: approximately 97 sq.ft. excess → New TSLR: approximately 39 sq.ft. further/excess discrepancy.

My concern is that this is not merely a difference on paper. The apparent excess is adjacent to/affects the area and access pathway in front of my Site No.24.

Therefore, my question to the experts is very specific:

If the Registration Department does not respond to my petition for verification of the original extent and registered records, what is the proper next step?

And, if the Revenue/Survey Department has entered an incorrect extent in the TSLR without reconciling it with the original Parent Patta, original survey records, FMB, subdivision records and boundaries, what is the proper procedure to have that apparent error verified and corrected? 

I want to know the proper administrative/legal remedy for verifying the original extent, identifying the source of the 97 sq.ft. excess in the registered documents and the 39 sq.ft. discrepancy in the TSLR, and correcting the revenue/survey record if it is found to be wrong.

This is the specific issue I need guidance on.