I am in JFK now and waiting for my schgeduled flight to EZE.

Since need to board soon so points only.

1. taken DTW-LGA
2. inital she said thre OW ticket is $370. I asked for involuntary re-route, she said no.
3. She said even I change the ticket I still need to pay, then I said I need only paid $230 so still better off to re-write.
4. She said she don't re-write the ticket and cannot do anything, asked me to call reservation.
5. I stressed I know how horrible to write the ticket so if they can get me a cheaper way than re-issue I will go for it.
6. after talked with RTW desk, the agent find me at the public phone and said they can offer me a OW ticket for $165.
7. I said yes and paid with voucher i got last time i got bumped.

Not as good as free but OK and save lost of troubles.

THANKS for comments!!