I’ve got no idea how to do this.

I have even supposed that I was inserting a username wrong in the Whitelist but after trying multiple accounts on my website it turns out that the whitelist is just broken.

You say that the whitelist should bypass the block, in fact it even says it in the description of the whitelist. This feature is broken and I needed to use the whitelist alongside the role block feature of the pro version.

I would like to request a refund since the Terms and Conditions state that you “will generally only offer refunds when the item you purchased is broken, malfunctioning or corrupt, or doesn’t work as described”, in which case it is malfunctioning.