PLEASE HELP, I had 1200+ songs and now I ONLY HAVE 600 songs for some reason

[exdry]

Plan

Free used to Be premium 

Country

 U.S.A

Device iPhone 6plus

Operating System

ios 12.1.4 

My Question or Issue

So Recently , somewhere around this new “heart” update my phone had all the songs i always had on Spotify.. but now for some reason it only has 600 songs and I’m extremely upset because I’ve even reinstalled multiple times and have checked on another phone (iPhone 7) and still nothing, just stuck on 600 songs. But on my pc I still have all my songs 1200+ on there. PLEASE I USE SPOTIFY DAILY AND IM GETTING SICK OF THIS ISSUE