I'm trying to be as objective as possible.
I bought used bicycle parts.
Before paying, I asked if it applied to the latest model.
The seller said it would probably work.
After payment, the seller shipped the package.
When I looked into it more closely, it didn't apply to the latest model.
Since I didn't know much about it before buying, I asked them to pay another 20,000 won.
The seller refused.
There was no mention of no refunds in the sales post.
This is roughly the situation. Is this a normal situation for most people? Should I start an argument or should I just accept it?