Not getting Mega Band after killing multiple Mega Bosses

[DarthThickums]

I have now killed 2 mega bosses and have not received my mega band. I first beat a Mega Banette and choose the Mega Anchor, after the battle I went to try to mega evole my Pokémon, but was told I did not have a mega band. Thinking it might fix if I killed another boss, I waited and eventually killed a Mega Ampharos and still am not able to mega evolve. Is there a different way on the server or am I just glitched?

 

[DarthThickums]

Attached pictures with prove of challenges and mega stones

 

[Noobtis]

@DarthThickums Hey there you see that little arrow in your inventory next to you're Pokémon try clicking that then clicking the band?