If you have any queries, you can post it on Sudoku Champs Forum. They will be usually answered in couple of hours.

Alternatively, you can reach out to any of following members for the respective cities

If you're based out of any other city, you can reach out to the below mentioned members

Hemant Malani	8584837457 hemantkr97@gmail.com
Amit Sowani	7019678898 amitsowani@gmail.com