I hate how this feedback stuff can be retaliative. As a seller, I usually leave the feedback for a buyer immediately based on how quickly they paid, etc because I feel, as a buyer, when sellers wait it seems like they are waiting to match feedbacks and that seems so dishonest, but with all the talk on threads recently about buyers leaving negative feedback for stupid reasons, I am thinking about waiting now, too because responding might be your only chance to explain if you are given a negative. Anyway, a month without shipment is a solid reason to leave negative feedback and it sucks that you feel like you can't in fear or retaliation. I have no idea what could be done to remedy that. Good luck!