Please allow 5 seconds more time to pick up the phone before the voicemail jumps in. I see that this is set to 25 Seconds. Most network systems allow a flexible setting of this from 5 to 30 seconds. Sometimes half a second makes the difference.
However, in the Koodo network the relevant network command codes are disabled, so the end user can not change the time setting. Maybe you can change this for all Koodo customers to 30 seconds. Or, with a little more effort, you could include a menu in the Self Serve part of the Koodo website where the end user could set this value itself. I've seen this offered my some operators.