I CAN'T INSTALL PROGRAM

I AM HAVING A PROBLEM DOWNLOWN YOUR ADOBE READER. ON MY COMPUTER. VERY TIME  I  WANT TO UPDATE THE  

    PROGRAM GIVE ME A ERROR ACTIVATION IT TELL ME SERVICE UNAVALLABLE.. SO YOU  ARE TELL ME TO UPDATE THE PROGRAM WHEN I CAN'T INSTALLING IT. I WANT TO INSTALL THE PROGRAM BUT I NEED HELP. THAT WHY I NEED TO TALK  BY PHONE SOME ONE CAN TALK ME THROUG THE DOWNLOAD. I NEED A CONTACT NUMBER.                                                             THANK YOU, MARIAN