I'm so confused, can I have some help please, I?

I'm also confused reading all the explanations you provided! I'm afraid, the company or institute might be a fake one! before attending their any invitation, better contact Broadcasting Company's any community or forum or federation etc. CAUTION: Pls, do not pay in advance to them for any reason. It seems to me, that they already rejected you after your bad result in the earlier interview; yet they want to hold you long unnecessarily. Probably they're trying some experienced one---if failed, they might accept you. But CAREFUL against any fraud firm.