Can no longer play pika (username issue)

[cusen_]

Recently i had decided to change my username, I use a premium account btw
I decided to change my username from Crystallyillqq back to an older name i used to use called cusen_
For some reason its saying i should join back with a capital C, even though i had never used a capital C for said username
do any of you know how to fix this?

 

[aeserior]

If you are asked to join with a differently capitalised username, there are two reasons why this can be the case. The first is that someone may have already registered that username on our network. In that case, use a different username when joining the server. If you registered the username on PikaNetwork, change the capitalisation of your username to what is stated and you will be able to join.