Answer

If you mean Shri Bhuvan Bhanu Jain Manas Mandir Tirth / Jain Mandir in Shahapur, Thane, I could verify the address but not a reliable public contact number in the current listings: Near Savroli Crossing, Mahuli Road, Shahapur, Thane-421601. ( jaintirthkshetra.com)

If you meant Bhagwan Ajitnath Digambar Jain Mandir in Shahpur, Ahmedabad, the listed phone number is +91 87329 37653. ( yappe.in)

Explanation

“Shahapur” can refer to more than one Jain temple/location, so I’ve separated the two most likely matches. The Shahapur, Thane temple listings I found did not show a verified public phone number, while the Shahpur, Ahmedabad temple listing did. ( jaintirthkshetra.com)

Takeaway

For Shahapur, Thane, I can confirm the temple location; for Shahpur, Ahmedabad, the contact number is +91 87329 37653. ( jaintirthkshetra.com)