Instead to say "wanted to" (cozz when we speak fast dat word sounds a little difficult) we say "wanned".
Past of "wanna"
A: hey dude...how ya doin'?
B: Not bad gal...u?
A: I angry cozz I wanned buy a lbd and I couldn't
B: Fuck off with yo problem...I thought it was another thing...I'm flat broke and I'm not crying....don't fuck me again...