Welcome to freelance work mate! That's what happens, a friend of mine, Windows98 made a Map for someone for $20, never got the money from him so he got ticked off and stopped...
Now think, he made a map, which is quite hard IMO, and not only that he was promised a price, that he never received...
Now how do you think he felt? Compared to you of whom did it for free? His hope was high for that extra pocket cash, of which he was promised but never received...
Now how do you feel? Do you feel let of a little from the anger that he could've created?
Now think to yourself, is it worth it for you to leave your work behind? To start your work anew in a different form? Is it worth leaving your skills in this form of work? Your hard honed skills? Is it really worth it?
Dear god, just take a 2nd look back and don't be stubborn about it...
Do you think that your commercial quality work is no longer worth being continued? Do you really think of that in that way? DO YOU?
And yet, this is just one person that has ticked you off, think about commercial freelance request takers when there payment hasn't been made on work that has been made and sent to the requesters, they don't quit, they don't whine, and they don't make a dramatic thread in a forum... They live with it and so should you... After all, you do this for a hobby correct? Like I myself? It's just a hobby, you do it for fun and if your serious about it, you continue your work even further...
And yes, I do hate drama like this...
No one knows just what has become of her, Shattered, dull, desperate, oh so innocent and delicate. But too damn obdurate, And obstinate to let go!