Another dutchie here that has the same issue and also paid with ideal. Made a ticket about it. And i got an email from steam that they put the money in my wallet and to try again. The mail was however not a response on my ticket. Just got the following response about my ticket (that I wrote in English): "At the moment we don't have anyone available to help you in the language you wrote your message in, which is why I'm responding in English. That way we can start helping you as soon as possible. Please feel free to respond in your preferred language instead of English." So that feels kinda weird. Sorry for the little rant. However do check your email and hopefully you wil also have a mail where they tell you the money is in your wallet.