It is well known now that Suretap is not working with any Samsung S6 serious phones. I emailed Suretap a few weeks ago, and got a response from Erica. She told me that it was a Rogers issue, and they were working on it. She also told me she would email me when it was fixed.
I got another email a few minutes ago from her, letting me know that it was fixed. I just tried registering my wallet again, and it is indeed fixed. My CIBC mobile payment app also works now.
So FYI, you all should be able to use Suretap on your S6.