As the link below indicates, the fix involves removal of the indicator stalk from the steering column. So, we are talking about parts replacement and labor.

https://genesisowners.com/genesis-forum/threads/turn-signal-not-cancelling-on-my-2011-genesis-v8.22427/

Of Possible interest:

https://www.hyundai-forums.com/threads/turn-signal-wont-turn-off.88129/