Showcause Notice for overseas income on 2014

Hi Experts,

I got show cause notice for 70L Rupees which I used to buy an apartment in 2014.

I have shared all income document and bank loan documents but still got a showcause notice to provide documentary evidence. Currently I am outside of India. Can CA or any representative appear for show cause notice ?

if I am not able to show up within 15 days time limit what will be the appr penalty amount which I may inccur ?