Why do you guys get away with doing what you want

I have been paying for fiber internet and a static public ip for roughly 2 years, Webafrica is the ISP and Vumatel the FNO. I pay extra for a static public ip because i host my own online services. I have been adown for 5 days and Vumatel just decides to issue me with a new public ip without prior notification or anything. This is the second time this has happened. Why do i pay extra for something if the provider just changes it when they feel like? I cannot believe i am the only one with this problem.

Vumatel has no right to change things on my account without communication. I hope more people complain.