How to unban my Snapchat account on iPhone?

Snapchat banned your account and/or device. Only Snapchat can lift the ban. You must contact SnapChat – if you can (*) – or live without their service.

https://help.snapchat.com/hc/en-us/articles/17988958753684-How-to-Submit-a-Locked-Account-Appeal

(*) On one of their support pages, they say "You can only appeal a lock on the same account twice, ever."

This has nothing to do with Apple.

SnapChat banned you. Only SnapChat can unban you.

Contact SnapChat Support. https://help.snapchat.com/hc/en-us

linnah275 wrote:

Help me to unban my Snapchat

Read the posts above. NO ONE but Snapchat can help you.

You will need to contact Snapchat support.

Help me to unban my Snapchat