Just Play, nice to hear your voice again.
Many casinos state that a bonus will be credited in a certain time frame (ie. usually in 5 minutes, but allow up to two hours).
But your answer from the first rep was vague...should have been more like "after you make $X in bets on slots". Please try to keep in mind that most casinos do not pay reps well and have high turnover, and not all casino reps are created equal. If you don't feel like your question has been answered satisfactorily, just keep asking. I never telephone, and always use livechat so there is a record of what was said. If they don't have a livechat, I don't play there.
And Casinomeister has the following criteria for accrediting casinos
http://www.casinomeister.com/casinos.php