Why do people with extremely heavy accents routinely repeat the same thing faster and faster when you can't understand their accent?
This seems to be a common failing of people from India. How can you politely ask them to slow down—to try phrasing their question or statement in different terms? I can tell they get frustrated, but when their frustration leads to repeating the same unintelligible string of gibberish faster and louder on each successive iteration, that is not helpful. Have you found a diplomatic way of bridging this language gap.