I want to remove the redemption button for customers

This page describes the "Allow customers to redeem on their own" option in advanced settings

Usually, businesses want customers to be able to redeem their points on their own using the perkville.com website. However, you can disable this feature if it fits your use case, by turning off the "Allow customers to redeem on their own" setting in Advanced settings.

The "Redeem" button has disappeared!

If the redeem button has disappeared, it's possibly due to the advanced setting described on this page.