Start by finding out how SQL thinks it's named: I use SSMS, bit I'm sure MyLittleAdmin will have something similar.
In SSMS you can right click the table name and use "Script table as ... new query window" - that will give you the "sql name" for the column. It's probably [[PagosExtra]]]
When you have that, feed it into this:
EXEC sp_Rename 'MyTable.[[PagosExtra]]]', 'PagosExtra' , 'COLUMN'
and execute it.
You'll probably get a warning that it might break scripts, but it should be a "normal" name now.