Crazy! The water bill is over 7000 for one month!

My friend, just two people living in a small house of less than 50 square meters, and this month's water bill reached 7k yuan, usually it's only three to four hundred at most. Could it be water theft? The electric meter is also outside, so it's not ruled out that someone might have stolen it, but this has never happened before.

Based on other people's analysis, I currently have three possibilities:

1. The water pipe burst. The reason could be physical damage, or it could be due to a sudden increase in water pressure, sometimes even caused by the sudden closing of a valve leading to dripping.

2. There might be issues like loose joints or damaged threads.

3. Water theft.

But jumping from 7 to 96, an increase of 89 within a month, the third reason is impossible. If someone was secretly sharing the water without the homeowner knowing, that's also unlikely, because on average this would be equivalent to the water usage of 13 households, and I should have noticed it by now. So I think the first possibility is more likely.

But who do I talk to about this? Maynilad, this garbage service awareness, I called several times today and they didn't answer. Doesn't the barangay care about this?