１ヶ月以上前にお願いしていますが、如何でしょうか。
順番に対応いただいているように感じませんが…
宜しくお願いします。

Thank you very much for your support!

Your account has been updated to Pro. Please check.
Sorry that this problem has bothered you for long. The failure of updating to Pro was due to a bug caused by the version updating of Google. Now it's in our development list, we'll fix it thoroughly in March or April.

We apologize that we didn't reply earlier. We missed so many. We are really sorry!
But from today on, we’ll reply normally every day.
Temporarily, I will only reply in English. We're recruiting someone who could speak Japanese so that he or she could reply you soon in Japanese.

Thank you very much for your support and understanding!
Any other questions or suggestions, you may still tell us any time.
(We also replied you via mail. Thank you!)