How do I get a refund for email seats?

How do I get a refund for email seats?

Hi,

I've been using Zoho for awhile and have been paying for 2 seats. Recently, I created another 9 seats, but I also found out that Zoho does not support cold emails, so these 9 seats created for this purpose became useless. It's within 24 hours that I raised a request to cancel the annual subscription, how do I get a refund? There's no replies coming from cancellation@zohocorp.com.

Appreciate any response, thank you.