So SAD!!! I went thru the same thing!!! ARGH!! In May, I put a sew-in in the back (Milky Way) and put micros in the front (Anna Hair). Micros looked great....sew-in part..whomp whomp whomp WHOMP!! I choose the deep wave for both brands and I would lightly moisturize and bantu knot the hair anytime I was "not out" and place a silk/satin scarf over it nightly (or anytime I was lounging). It SOMEWHAT preserved the hair, even after I began to notice the frizzy-tangled-mess, but I took it down a little over a month after I spent time putting it in. I too, had to chalk it up as a lesson learned.
As with anything, I am SURE there are others who love it, but Milky Way gets NO play in my hair. I am VERY easy with my extension hair, I braid/sew it in it myself (outside of my installs) and want them to last (clearly), but no matter HOW careful I was, how EASY, how much I DIDN'T handle it...Milky Way acted up in the worst way.
The Dominican shop suggestion (especially since its human extension hair) might not be a bad idea; however, you've had the install for 2 weeks and already its giving you the biz...not sure if you should waste the money on the shop trip...since clearly the install, given how the brand of weave is acting with you, was a waste. HTH.
-S-