Boost Mobile

I bought a screen protector and the person working there put it on my phone incorrect. It had big bubbles on top and bottom. I was told by her and the store mgr that they will replace it but I had to wait for one to be ordered because the one o bought was the last one in the store. While I waited for the replacement the top where the bubble I is got a crack and when I went in for my replacement I was told they would. Not replace it now that it has a crack in it. I asked to talk to upper management and was told they can not give me that information. This is not ok for them to treat a customer like this . and I'm t a king this all the way to get this taken care of. The staff there think its funny as well and they have bad customer service.