@elena
Your public fumbles are VERY useful for other (upcoming) selfhosters! Be assured! This is gold for technically less versed Fediversians :).
Btw: if time (and nerves 
) allow, you could re-read the service contract with OVH, this kind of termination policy seems a bit strange to me 
. Maybe you could push for some money back.
Just a thought tho.
Or maybe you have already ofc.
Best of luck for the further steps! Many watch and learn 
.