Would this be considered a penalty kick

Hey Milanmania faithful, I have a question that requires your expertise. I was playing soccer today and I was involved in a play that I think should have resulted in a penlty kick to me. The ref didn't call it as a penalty, and as rsult our team lost the game. As mentioned, I think it should be a penalty kick, but I'm not 100% sure. Here is what happened.

The game was in the later stages and I had just received a through ball from my midfielder. I had beat the first defender but still had a defender at my ankles. The defender was tugging at my shirt enough to impede me, but not enough to pull me down. I took a shot with whatever remaining ability I still had but it went wide and out past the end line. After I shot the defender who was tugging at me mistimed his sliding tackle and hauled me down. Because I was taken down illegally andwas in the box I expected a penalty to be called, but the ref issued a goal kick. Whe I asked the ref of his reason his answer was that because the ball had already been kicked out the resulting tackle did not constitute a penalty kick. End of dissucssion.

My question is simple....should it have resulted in a penalty kick? I think it is yes, but I'm not sure. I would be grateful for anyone to help me out. Thanks.