AZ PHX RES IPv6 - Static Leases allowed?

Hey there, I just logged into my cisco router and noticed that i have an IPv6 lease now (I am in East Mesa, 85212). I've opened up a chat to see if its possible to get a static IPv6 lease for an additional amount and was told yes. I called tech support to order it and then i was told its not possible without going to a business account.

Chat person knew i was on a residential account. So which is it? Is cox allowing static IPv6 leases or not for residential?