I didn't go anywhere else. I just went to get a massage.
「他には何処も行ってません。」= I didn't go anywhere else
「マッサージ受けに行っただけです」= I just went to get a massage
ボキャブラリー
「他には何処も」= anywhere else
「行ってません」= didn't go / haven't been
「マッサージ」= massage
「受けに行った」= went to get / went to receive
「だけ」= just / only