YOU SAID:

I am truly grateful for your assistance with this matter

INTO JAPANESE

この件についてのご支援に心から感謝いたします。

BACK INTO ENGLISH

Thank you very much for your support in this matter.

INTO JAPANESE

この件についてご支援いただきありがとうございます。

BACK INTO ENGLISH

Thank you for your support on this matter.

INTO JAPANESE

この件についてご支援いただきありがとうございます。

BACK INTO ENGLISH

Thank you for your support on this matter.