English is also not my mother tongue, but this translates to "I'm sorry you feel like that, but we don't care or change anything, can I call you to convince you into doing things our way while completely being off the record?" in my mind.
This is forceful and rude in my culture, but it's very rude and a no-no in Japanese culture AFAIK.
If the person wanted to help genuinely, I'd expect to read something like "I'm sorry you feel like this. I read your comments but I want to clarify some points so I can transfer these up the chain with utmost clarity. We might have made some mistakes and don't want to leave you out in the cold".