I want to change my MAC address in order to access snapchat because they banned my device

You cannot change the Mac address of your device.

Snapchat is not an Apple Product. Contact the app developer here --> App Support or Contact us - Snapchat Support

Any social networking app typically bans devices or users for violating its community guidelines or terms of service. Some common reasons for bans may include:

1. Sharing explicit or inappropriate content, nudity, violence, or hate speech can lead to a ban.
2. Engaging in spamming activities, sending unsolicited messages, or using third-party apps to automate actions on the app can result in a ban.
3. Creating fake accounts, impersonating others, or using someone else's identity without permission violates their policies.
4. Sharing or promoting illegal activities, including drug sales, harassment, or threats, can lead to a ban.
5. Harassing, bullying, or intimidating other users can result in severe consequences, including a ban.
6. Any breach of app's terms of service or community guidelines can lead to device or account bans.

A few social networking apps have automated systems and human moderators that detect and take action against accounts or devices that violate these policies. Depending on the severity of the violation, the ban can range from temporary suspension to permanent removal of the account or device from the platform.