I contact the support about this issue. If the bonus funds were not used you can forfeit the bonus anytime you want and withdraw your deposit funds. However if you already wager some and notice you have active bonus, You can freely contact there support to help you get out on your messed. That's what support tell me and it only took a few minutes to receive feedback.
It looks better however support has been provided there that will help solve all your problems it would be a shame if they didn't take advantage of it
Even though the admin can actually make it easier by providing a link regarding the rules so users don't need to ask support first.