I have a new client for whom I am designing a vector logo. I provide 3 concepts and he is supposed to choose one of them based on which I will be making unlimited revisions. Unfortunately, even though I have provided him with 13 unique logo concepts for the logo already, he is still asking me for a logo design that looks "more modern". I do not understand what he means by "more modern" and so, I asked him to give me some examples. However, he is not giving me references- like some logo designs that he likes, despite me asking him to provide me with some references because I am not sure what he wants exactly.
I collected feedback from other users for the logo concepts that I have already made. Most of them like the logos and find them creative and unique. However, the client may have something else in mind but he is not sharing some examples or references. Due to this, I am unable to figure out what kind of logo is he exactly looking for.
I have already collected the payment for the logo design. But I am having to work too much in creating fresh concepts. And the client is not supporting me with some logo design examples or references/inspirations that he likes.
How do I deal with my client in this situation? Also, if the client is not satisfied with the designs, then will it be a good idea to refund him the amount, or shall I make it non-refundable considering the enormous amount of time and efforts I have already invested in creating so many concepts?
Thanks a lot.