Find my phone will not let me turn it off

From any browser:

www.icloud.com/find

Log on using your Apple ID and Password

Select the iPhone 5s

Tap or click Remove This Device

Tring to shut of find my to get my replacement and I can’t do it.

I’m trying to order my replacement phone and I’m order to continue i have to turn off find my phone and it won’t let me what do i do

I don’t have a 5 I have a 13 pro