Help, remove Zoho plug-in for Microsoft Office 2003

Help, remove Zoho plug-in for Microsoft Office 2003

One of my clients recommended Zoho to me. I installed the Zoho plug-in for Microsoft Office 2003. It never worked, keeps telling there is an error. I am ont trying to remove it from my computer. I have tried over hundreds of times. The Zoho bar still there on my Microsoft Word.
Is Zoho a scam? Can anybody here help me remove it? I tried "Run as Administrator" on Word and uncheck the "Zoho Writer Word Add-in" and tried almost I can find on the internet, it just like a virus and cannot be removed.
Pls. give me some help. I am going to report Zoho as a scam and virus to all the IT forum, web site, magzine.....