"should be avail" is just the CSR being cautious, since they don't have any specific info about the channel. Bell wouldn't have added the channel unless it would be available after the preview. It's not unusual for a TV provider to have a new channel on preview and not have it available to add as a subscribed channel until the preview is almost over. My advice is to check again near the end of the preview if you want to get it right away.
The following channels will no longer be offered by their content providers: Comedy Gold as of Aug. 30, 2019, and IFC and CosmoTV as of Sept. 30, 2019. If you have any of these channels in a Custom Pack, we will add a replacement channel that you can change at any time