Pissed Me Off

Sometimes I just don't get it...
I had a call last Sunday from a guy that I know really well. I wasn't able to talk to him when he called so I let it go thru my voice mail. Finely today after work I came home and decided to call him and see what's up.
I dialed and a girl picked up his cell phone. I said Hi and if I can please speak to "A". She asks who I was to be asking for him. I told her my name and say that I was returning "A's" call. So she is investigating asking me all different questions. So I said to her ( look, I don't know what's going but "A" called me last Sunday and I was returning his call. Okay?)
She pauses and then say hold on. So when "A" comes to the phone I automatically started talking in French because for some reason I had a feeling that the girl was eavedropping.
I was saying (sorry) to "A" for this to have happen. When he said (Who is this? )
I told him (hey it's me. What's up?) He acted like he didn't know me.
Now I have this uncertainties in my voice like (I think I am calling the right number here.) I ask him again (Am I talking to "A"?) he said yes. Like I suspected the girl starts asking me If I could speak in English and say the reason why I was calling . He owns a store, so when the girl said have you bought DVD from him before I said yes. I played it off to help him. So I said "A" again sorry I missed your call last Sunday that is why I was calling. Did you get some new stuff in that you wanted me to check out? Still the guy is playing like he doesn't know me. By now I am so pissed off, because I just lied for him. I never bought any DVD's from him I just said it to put it off the spot.
And the crazy thing is nothing is going on between us. So I don't know why he was freaking out saying he didn't know me. When all he had to say was I am a friend of his or a client. I mean how stupid can this guy be? I think that he has gotten himself in more trouble playing like he didn't know me instead of just saying that he was calling to say hello and see how I was doing and that's it since we are all from the same country or whatever.
So now they both asking me questions. I said to both of them (Hey hey, I called you back because I got a call from you since you have a memory problem then lets' just drop it . As a matter a fact I never called you back. You don't know me and I don't know you)
So the girl asks me (are you really going to forget about this?) I said : of course. Why not?
And I hang up..

My thoughts are how can someone be that Stupid. I was so mad at him. Because he turned a very innocent situation into something shady.