I thought that this is a scam because no one has answered me for more than 2 weeks and when I upload documents in the account settings, it's rejected without any explanation. I tried to discuss with support, but my problem is still unresolved.
How is it "without any explanation" when you know exactly what you did to cause your documents to be rejected? I don't think you can reasonably expect to be allowed to try KYC with different names until you pass. You may be allowed to correct a spelling error or a blurry photo or something, but not "oops, I'm not really that person, let me pretend to be a different person".
Anyway, no one here can help you. You may try to PM Stunna as advised above but I don't think jumping to scam accusations is helping your case. If he feels generous you might get your initial deposit back.