Updated
Mobile access needs an identified application or page
A Mahadev Book versus LeoVegas comparison should distinguish an installed app, a browser page and a shortcut. Calling all three an app would obscure what was actually observed.
The mobile access guide explains those differences. This page does not verify a current LeoVegas application, download source or compatibility claim. A familiar logo does not establish who published a file.
A responsive screen is not an account outcome
A page opening quickly does not establish completion of an identity review or receipt of a payment. Likewise, a displayed balance does not confirm that funds reached an external account.
For an existing access error, retain the page address or app name and the exact error text. Avoid sending passwords or one-time codes. An interface observation cannot support a general verdict about the safety of either service.
A support reply needs to address the actual issue
Keep a technical-access enquiry separate from a payment discrepancy, with the relevant references for each. A general acknowledgement may not resolve either question.
Mahadevbook7.com's contact page describes this site's enquiry route, not independently verified LeoVegas support. No tested app ranking, payment deadline or continuous support coverage is established here.