The American immigrant visa was returned.

This is to give you supplementary materials, it doesn't mean that the visa failed. What materials have you added? If the materials are normal, it's no problem to issue you a visa. When you supplement the required materials, you will be informed to collect the visa package within one month, if the materials pass. If the materials you provide do not meet their requirements, they will inform you to supplement them further. I won't send you a visa package until the supplement is correct.