STOP ALL E-Mails to Me

I tried to down load Ununtu , I lost Windows completely , ALL of my documents is gone , nothing is left on my hard drive , I DO NOT WANT ANYMORE E_MAILS FROM UBUNTU ! ! I got e-mails telling me to do this and that , but I can't find any place that says "unscribe" , could you either tell me how to do it , or could you do it please !

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