Hello. We are working with many data centers with OVH too. And they dont offer support and for this reason when the customer decide request refund to give up the services the refund of funds lasts a very long time. What server do you want to buy?
Actually if you are going to buy Dedicated Server, its not feasible for companies to provide money-back guarantee on it, however money-back guarantee is easy to provide on reseller hosting accounts n shared hosting accounts, as dedicated servers costs for their setup including bandwidth used for that specific month (first month)