The maximum interaction ranges should not really have any effect here since the default value is quite long.
The best way to increase the basis set range is to setup the script in scripter, and during the export of the script select the detail "Show All".
It will print all the details of the basis functions and here you will be able to set the basis range of each orbital using the keyword radial_cutoff_radius.
In order to get results you must also move the confinement barrier radius, and I would always choose this to be 0.8 times the distance of the radial_cutoff_radius.
You can set this using the confinement_start_radius keyword.
My guess is that it is not required to increase the basis set so much in order to get results. I would except that adding 3 Bohr will for sure make it converged in terms for
the work function.