Yes, I have the 6 character code. (But only the Group one)
The record locator for the group is the same as that for the individual passengers, unless the booking has been split in which case there will be separate locators but they are all linked and visible on each record.
It seems to me that the agent just cannot be bothered to help individuals.
Now there's a surprise!
Anyway I see the OP will already have left so I hope all went well and that the trip to Barcelona was
molt bé (and hopefully you didn't run into my mother-in-law!)