YOU SAID:
Thank you for taking our survey.
INTO JAPANESE
アンケートにご協力いただきありがとうございます。
BACK INTO ENGLISH
Thank you for your cooperation in the survey.
INTO JAPANESE
アンケートにご協力いただきありがとうございました。
BACK INTO ENGLISH
Thank you for your cooperation in the survey.
That didn't even make that much sense in English.