4runner 3" lift why is the back sagging?

Just got my 2016 sr5 4runner lifted a 3" lift and the back seems to be sagging.....help please. I requested a 3 inch lift it included a
-2012 Tacoma 3" front spacer lift kit
-Front diff drop kit 05-13 Tacoma 03-09 4runnee
-1.5 inch spring rear spacer 03+ 4runner
-07-13 FJ CRUISER ES 9000 series rear shock
-black boots shock
Help why is it sagging and that 1.5" doesn't sound right.

 

im not sure on 2016's but i know most 4runners to have a level lift its 3" front and 2" rear, and so the 1.5" spacer may give you the appearance of sagging when in reality the front is just lifted more. If I was you I would wait about a month and let the entire suspension settle out, then see if the lift looks more level

 

I just looked on the shops page and it says for a basic 3" lift its 3 in the front and 2 in the back so I'm going to take it back to them and make them fix it. That you for your help

 

no problem, best of luck!