So, I´m usually a patient and understanding person. When it comes to dealing with some sellers, today I have had it enough.
I´ve experienced some sellers are late with the delivery, that´s fine, I always let it slide as I try to be understanding. What I think is not nice is, when they don´t even bother to let me know that they are going to be late, even after passed delivery time, like totally silent as if the seller is gone in the darkness (edit: it didn´t happen just once, it happened numerous times with different sellers).
I usually don´t message the sellers first before I place an order coz I don´t want to bother them. And besides, I only give a task which in their gig description they say they can do such task (and no seller has ever told me that they can´t do the task). That is the reason why I usually just place an order and give my instruction without too much yappy yappy yappy. But after what I have experienced a number of times, I guess next time I will message the seller first and see how good they communicate.