V.important! Overstaying in Taipei.Is it Okinawa or home?

Anyone overstayed before? My visa expired 12 days ago and I’ve been told I may have to leave and simply return back to my country. I was also told I could leave and renew my visa in Hong Kong etc. and then come back soon. I don’t know who decides and which is more likely to happen. Do you?
I should have renewed the visa ontime but now I face the problem of having to pack up suddenly and leave! Just when my chinese was starting to pick up! What should I do?