There was no price on there. I just assumed it was 4500 for over staying. But instead they put me in the category of leaving without paying. Which isn't right.
"They" (migraciones) did not put you in the category of leaving without paying. The act of leaving without paying (based on an erroneous assumption) did that.
...I went back to the border and explained my situation and that I was lied to and wasn't given the option to go back to town to pay the correct fee. Typical response. Not my problem and we can't change it.
You apparently think you are the victim here and I have to agree that you are. You are a victim of your erroneous assumptions of the details of the laws governing the tourist visa. It isn't the responsibility of any border agent to explain your options or the details of the law. It is the responsibility of every tourist in a foreign country to know the rules and regulations (aka laws) governing their visa.
Just because the first official did not tell you the fee/fine would increase from $4.500 to $15.000 pesos if you left without paying doesn't mean you were lied to, unless that official actually told you that the fine would still be $4500 pesos if you paid on line after leaving. I seriously doubt you would have been "lied to" if you had asked the appropriate questions about the fees, and I'm reasonably certain that you still had the (legal) option to "go back to town to pay the correct fee" before you left without paying, even if the official never told you that you did..
So I ended up just walking through the border. I have my bag. Now I just need to get back out
You just walked trough the border,
reentering Argentina without going through migraciones and without paying the prior $15.000 overstay fee? Do you have any idea what the consequences of that action might be?
I am not an expert on the law, but I can think of the following possibilities at this point:
1. You are allowed to leave without paying the original $15.000 pesos overstay fee.
2. You are allowed to leave after paying the original overstay fee of $15.000 pesos.
3. You are allowed to leave after paying the original overstay fee of $15.000 pesos plus an
additional fee/fine of $15.000 pesos for not having an entry stamp that follows your recent exit stamp.
4. You are detained and then deported without paying a fine with a multiple year ban on your return.
5. You are detained and then deported after paying a fine with a multiple year ban on your return.
6. You are detained, charged, and prosecuted.
Hopefully, Dr. Rubilar (Bajo_cero2) will read this. Perhaps he can advise you how you might be able to leave, with or without paying the fine(s) and/or without being detained (if that is actually a possibility at this point).
PS: I sincerely hope you have already been able to leave the country without difficulty, but if you haven't yet done so, I urge you to wait for Dr. Rubliar's response before attempting your final exit, as I fear that just "walking though the border" could be considered a more serious offense than an overstay.