Amazon account was restricted after I got a refund. How do I appeal the restriction? Not able to use any of their CS channels.

This is the first time that Amazon has restricted my account in any way and their email, neglects to explain what I did that went against their website terms. Now I can't get a CS chat open or get an Amazon CS rep on the phone.

So far all I've seen online as far as ways to appeal are concerned are articles and videos about appealing restricted seller accounts. Nothing about customer accounts.

Has anyone had their account blocked/restricted in this way and was able to successfully appeal or do you just have to wait until they decide to lift their restriction?

This is stressing me out because they also said in their email that their next move would be to suspend my account if I went against their 'Online Terms' again.