How to remove guix

[Mick Sulley <mick@sulley.info>]

I am having real problems with Unison, I installed via Guix and it is 
not working so I want to remove it and try with an apt install.

I have run

     guix package -r unison

and it seems to work, I have also installed unison with

     sudo apt install unison

and that seemed to work as well but then I see

mick@holly:~$ unison -version
-bash: /home/mick/.guix-profile/bin/unison: No such file or directory
mick@holly:~$

so it is looking for the guix version and not seeing the standard apt 
install.  So

1) How can I get it to look for the standard version rather than the 
guix version

2) How can I remove guix completely?  I have searched on-line and cannot 
see anything on this.

My PATH is

mick@holly:~$ echo $PATH
/home/mick/.guix-profile/bin:/home/mick/.config/guix/current/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
mick@holly:~$

Thanks

Mick