I Didn't get my Chest for getting an s-.

I was playing garen the other day and I have just been practicing him and been pretty good. I got my first s- that day and as usually i had chest to available to earn because i rarely steer off who i normally main. Then i honored someone on my team n thought that's weird those no pop up for my chest i know i should have got one. I check my collection and it says i earned a chest on garen. Then i checked my loot and i didn't have any more chest than i started with because it should have started a new stack of chest since i only owned chests i had bought with RP at the time. Any suggestions on what I should do besides report it because i already did that.