YOU SAID:

I have never bought candy in a seven eleven I have only bought soda.

INTO JAPANESE

私はソーダを買っただけで、セブンイレブンでキャンディを買ったことはありません。

BACK INTO ENGLISH

I just bought soda and never bought candy at 7-Eleven.

INTO JAPANESE

私はソーダを買ったばかりで、セブンイレブンでキャンディーを買ったことはありません。

BACK INTO ENGLISH

I just bought soda and never bought candy at 7-Eleven.