My name is Steve, i have used Zoho for 1 week and my leader have just create new account for me on Zoho

My new email account is: tan.vo+zoho@sparkxlab.com

But my company email is : tan.vo@sparkxlab.com 

I want to use my company email to sign in Zoho but Zoho inform me that this email already exist

Please help to delete my company email (tan.vo@sparkxlab.com) in your system

thanks so much