Am I being an unreasonable buyer?

So I bought this sweater on Saturday, 01/06, and it’s been a struggle. This is my second time ever using depop, the first time my item was shipped next day, which while I wasn’t expecting again did lead me to believe I should have some sort of communication in the first week.

When I bought it on 01/06, in the posters bio there was a note about behind on vacation until Thursday, so I didn’t mind the delay at first. I waited until 01/14 to message them, since they should have been done with their vacation by that point.

After their response I waited again until 01/22 for an update, since they said they were still on vacation and it would be shipped by end of week. No response. I can see they’ve been active this week on depop but they’ve still left the vacation note in their bio.

I’ve sent two more follow up messages on 01/24 and 01/25. I just don’t want to time out of the depop return time frame and lose out on money. 18$ isn’t a whole lot, but that’s still money I could spend elsewhere where for food/gas/bills.