The style of communication seems perfectly fine to me. It's acknowledging there's a problem, apologizing as much as they can before they have the real facts, and offering to communicate over the phone to figure out what's really going on. I honestly don't know what more you want from someone who is a customer service manager. Not the leader of the team who built the translation product.
The problem is, its false to insist that the manager does not have real facts. The facts have been stated by OP in the first post in the thread, and while the statement can be true or false, it's not like it's not there. The responder should have listened and evaluated this, possibly with consultation with PM of the feature, and just by this response we can assume s/he just didn't listen.
Moreover, OP chose the very thread as the venue, and attempting to switch it to a different, intransparent one is a disservice to the community. Community is very important context of this message, and the response seems to validate the proposition that it's really the end of it, per the subject of the thread.
