Looks fungal. You can just keep an eye on it... if they dry up and don't spread, no worries. If they start to spread, a fungicide might be in order. On the assumption that you'll hear fro the seller soon, I'd suggest not treating until you do hear from them - if an adjustment is what they suggest, you'd want the plant to be as you received it. I suspect that it was just cold water splashing on leaves, in which case it won't progress to a bigger issue.
---------- Post added at 02:45 PM ---------- Previous post was at 01:29 PM ----------
Another note... these tend to bloom on older, leafless canes (though they may also bloom on canes with leaves). So loss of a few leaves isn't going to harm blooming. And of course, don't cut old canes until they are truly shriveled and you're sure they're permanently dead - because they can bloom even when they look like they're on the way out.
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