You should be able to call all numbers in these places
https://www.fongo.com/calling/free/705-328 numbers are listed as being in Lindsay
705 328 Bell Canada 8051 In Service Lindsay
and I can see Lindsay in the list of free places, so calls should go through.
Are 705-328-XXXX new numbers? Sometimes when new numbers are added to exchanges it takes a while for the rate tables to update here.
This thread
viewtopic.php?f=10&t=5418 is usually monitored by staff so post it in there. It would probably be worth sending in a support ticket also
https://support.fongo.com/hc/en-us/requests/new