SQL Server 2014 records missing

Still, I am unable to find the root cause for this one trouble. Around, 40% Employee records are missing. I also wasted several hours with manual recovery but did nothing.

After searching on this forum and I found one thread:
https://forums.toadworld.com/t/missing-databases-from-sqlserver-connection/6302

But still facing same issue. After tons of searches over Internet, I found few resources:
https://social.msdn.microsoft.com/Forums/sqlserver/en-US/6b623761-a3e1-47d5-b41c-63a95e4def95/find-missing-records-in-sql-table?forum=transactsql

https://dba.stackexchange.com/questions/71626/is-it-possible-for-sql-server-to-miss-rows-on-a-select-where-pk-value-quer

https://www.stellarinfo.com/sql-recovery.php

https://www.diskinternals.com/mssql-recovery/

Above resources are paid. I can’t afford a single penny.
Help me!