BAsically i cant play minecraft because of my name

Put the summary of the bug you're having here
So I changed my name to golem_haz but for some reason, my name is not the same on Minecraft so when I try to login to online services my games cant connect
What I expected to happen was...:
Describe what you thought should happen here
My name would change
What actually happened was...:
Describe what happened here
My game bugged so now I cant play online services
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ... Change my name
3. ... game wont run online services