Farrubhai, may I suggest you read this article for
people new to wholesaling?
Also, given the pace of expansion in China, what do you really expect their authorities to do? They must have a backlog of complaints big enough to last them several years from official foreign sources. We are private, not official.
What kind of response do you think you would get from your own, UAE, authorities if you asked them to make a complaint on your behalf? Because that is who the Chinese authorities would listen to, not you or even all of us collectively.
Your own authorities would tell you you got the samples as you requested. That is what asking for samples is for. If the samples do not make the grade, do not buy the product in bulk. They would be absolutely correct to tell you that.
One final, extremely important point. If you cannot afford to risk the money yuo are laying out, start off much closer to home using sources you trust until you have built up enough capital to risk
a proportion of it elsewhere.
Now, if the purpose of your post is to say "Hey, guys, I tried this one. Add it to the list as not worth bothering with", thanks for the contribution, that is very helpful.