Wrong info on my report

I am not too sure how these credit Bureaus work but they sure have different information on me. I got swift help from Compuscan with my credit dispute and they removed the disputed info from my report but what I got from the Experian report was totally different even worse it shows I have a default there that I was not aware of and has never shown on my Compuscan report. I emailed them and I have been waiting for a response.