Now back to my challenge: I've deposited
this transaction, used the default Service fee (I'm not telling you how much exactly), set a delay anywhere from 0 to 23 hours (I'm not telling you my choice), and I lowered the fee
because fees are low.
Did you sent them to a P2SH adress? I've found a trail but it seems that this one would a bit too obvious to actually be your receiving adress (+ the fact that the fees are actually a tad bit high on the transaction itself...).