Underpaid in Ahmedabad - BCom LLB graduate offered 10k for 9hr job, is this normal?

I'm posting this on behalf of my sister, who's a 27-year-old BCom LLB graduate living in Ahmedabad. She was preparing for an exam, but unfortunately, didn't find success, so she started looking for work. Luckily, she found a job near the home (walking distance), but the pay was a disappointing 13k. She asked for at least 15k, but the lawyer told her "you don't think of money, start the work."

Things took a turn for the worse when, after just one week, the lawyer told her that she wasn't good at a typing task he assigned to her (apparently, he has a bad pronunciation and she struggled to understand him when he said "major" and "measure" and some confusion in dates). He's now offering her a whopping 10k, which is even less than what the office peon earns (12k).

I've advised her to continue working for now and start looking for other jobs, but I'm shocked by the low pay. Is this normal in Ahmedabad? Are lawyers and law firms really paying their employees so poorly? My sister is a qualified professional, and it's frustrating to see her being underpaid like this, especially for a 9-hour job.

Update: Thank you all for your replies. She left the job—or rather, got fired—because she asked for the ₹13,000 that was originally promised, but the lawyer suddenly dropped it to ₹10,000. When she brought it up, he got angry, shouted at her, and went on a rant about how he earned just ₹500 a month in his early days, and even his son started at ₹8,000. (Well, then why promise ₹13,000 in the first place?) He even called the person who referred her to complain.

Now, she’s considering going back to her exam preparation. As her younger sibling, I’m unsure how I can help, but if that lawyer is somehow reading this: please stop exploiting people and at least pay what you promised.