When you say you bought it, do you mean the download or the CD version?
In any event, it would benefit you to read some of the previous posts. They will answer many of the questions you are likely to have, such as this one...
Your frustration is understandable. Many people, including myself, have had this type of problem in one form or another. MAGIX doesn't seem to be interested in doing anything to correct the issue. But, don't give up. It is fixable.
If this is no help, I'd suggest calling MAGIX tech support. That seems to be the quickest way to get results. Do not bother emailing tech support. It takes too long and they seem to give the same useless responses over and over.