adding new room type

Hi everyone,

I'm Victoria, and we've just opened a camping / Glamping place with rooms in Kayaköy, South West Turkey.   

We have five types of room here, and when I registered, I only registered two room types.  I'm trying to add the other room types, but it isn't giving me the option of changing the room name; it's using one of the room types I already have.

I'm sure there's really simple way to do this but I can't seem to find out how to do this.  

if anyone can advise, I'd be very grateful.