Is this service legal, or is there a legal company that will think about it? Negative reviews are part of any activity, as it is rare to find work that deserves 5/5 if you ask 100,000 people about it. these negative reviews are evidence of the quality of the platform if it is resolved professionally or It wasn't fraud related. I would be wary of platform with 100% positive rating over 95%.

You are offering a promotion service and your UI/UX design is still incomplete, it is a bad way to introduce yourself and your activity.