Yes it is the better option to contact support.
They only solved my problem too.
I've uploaded my first model 5 days ago and was able to participate in a First Model Challange, but while editing description of my item I've accidentally checked mark that it contains nudity. Because of that I'm not able to participate in this challange. Is there anything I can do about this?
I had a same problem like this in the before contest, but then my problem is a bug.
Just edit the model again and this time untick nudity.
That's all, try it and say.
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