Scripts executed on your computer or mobile device can only change what you see. You can use a client-side script to visually alter a menu or make it look like a button is ungreyed.
Roblox utilizes a highly effective anti-cheat system called Hyperion. If the system detects you injecting scripts or attempting to manipulate the game code to bypass a punishment, your voice chat ban will quickly turn into a permanent ban of your entire Roblox account. How to Legitimately Get Unbanned from Roblox Voice Chat Roblox VC Unban Script
Roblox uses a combination of automated systems and human moderators to monitor voice chat. Bans usually occur due to: Scripts executed on your computer or mobile device