I got your PM, not much I can do about it. As others above me said, the connection checks out. Whether you actually scammed or not does not matter much for now. The ratings are usually given in advance to prevent possible scams. It might give you an argument to have the ratings changed to neutral over time though.

IMHO the best thing you can do now is keep going and show that you can be trusted. It will be the more difficult way though. The easy way out is to just bump this account and start again.