Infinite controllable servo

I’m looking for something like an infinite controllable servo.
my goal is to turn a knob about 750° . So a little more then 2 times around.
But I still want to be able to open or close for 40 or 50% or something
maybe I need some gearing wheels because the servo is not powerful enough which means the servo has to do even more cycles.
So I was hoping there is a servo with a controllable angle of 360°
At that point I can control the servo like this [0°, 90°, 180°, 270°, 0°,90°, 180°,270° ect…]
to have it done more cycles.
I checked an 180° servo but this one I can only control 180° and when I go over the limit, to just makes some weird uncontrollable moves.
I also purchased a 360° servo, but that one just turned out to be a continuous servo which makes it impossible to calculate the exact position.

Does a servo I’m looking for actually exists and if yes, where can I purchase them?

I live in the Netherlands, so that would be preferable, but I don’t have any issues ordering over the border if needed.

Thank you.