how to remove Project Wiki Add-On from our account?

how to remove Project Wiki Add-On from our account?

We're overall pretty happy with Zoho Projects. However we do have one billing problem that we're hoping you can help with.

Last summer, we added the Project Wiki Add-On to our Zoho Projects account.

Because the backup facility was never improved upon for the Project Wiki Add-On, we've never felt comfortable utilizing the Project Wiki Add-On.

As a result, we've gotten basically no value out of the Project Wiki Add-On.

When we come up for the annual Value Pack 2 renewal at $199/year, how do we remove the additional $99/year Project Wiki Add-On from our account? (while keeping the the Value Pack 2 renewal at $199/year)

Note: Prior to placing this post, I tried utilizing the "Submit a Support Request" form. On clicking Submit, the "Loading..." box stayed up idefinitely.