Anyways, sorry for the bad news bud, but you should have already known that there is the possibility of losing your VIP host if your activity drops on the casino, there was an amount of wager you reached before a VIP host was assigned to you, I think its common sense to know that to keep your VIP host, you have to maintain that wager amount every week or monthly depending on what is written in the agreement.
Pretty sure you did not read it from an official article or guide by Stake, I guess you read it from a post by member in this thread or maybe a post in the Stake's forum. I have never read any official statement from Stake about the possibility of losing VIP host. Unfortunately players know that there is a possibility to lose VIP host from other's experiences. There is also no official written rules that players need to wager every week or month to keep the vip host.
And yeah , you might just be right, if no such document on stake VIP host is contained on the stake platform, then its very possible i read about it from this forum, possibly a post from an experienced user of stake, and thinking whether i read it from stake forum, not sure about that since i dont visit that forum often.