trial email for update

trial email for update

Hello,
my trial period is over but i continue to received this mail from zoho: 

"Your Zoho Docs Premium trial will expire in 2 days and I hope you have been able to get the most of it already.

You can continue to use the basic functionalities of Zoho Docs - free, forever. If you think Zoho Docs Premium plan is what your business needs, go ahead and upgrade your plan now". 

I donno update and i have already write to zoho because they send me EVERY SINGLE DAY a notification... is very srtressful.
Can u help me?