So how does it work? I'm trying to top up my bitcoin balance and it keeps getting errors when pressing "refill" such as: "Please fill correctly inputs" and "An error occured ..."

On the Privacy page it says you can process customer data to IDcards and bankstatements. In my opinion, don't offer "no KYC" in the list of advantages as long as you are trying to comply with regulations as a centralized payment service. Such services do not escape the scrutiny of legal entities and the advantage you offer becomes useless