I second that; I currently have a GAME-16 from SoYouStart. They have some great filters to block out all the minor attacks (ofc the major ones are unavoidable, even with a paid mitigation system). It runs at ~$49.99 a month, which is cheaper than what OVH GAME offers (prolly just phased out OVH hardware, but still works like a champ).To be honest,OVH VPS is not very well protected by DDoS attacks.
Try getting VPS from their resellers who already have OVH GAME firewall,not directly from OVH VPS store.