Ahoy hoy everyone!

So I have all characters available to get via Superior power cells sans 1, namely Captain Marvel. Over the past three weeks i have opened around 20 superior power cells to no avail, so once I got my last daily reward for May, I stopped playing to do the 7 day legendary power cell thing.

Since then, I have received many notifications from the game. The first stating that they have an unstable ISO-8 power cell for me, then a few days later stating that there is a Superior power cell waiting for me. On the same day as the superior power cell message, I got a notification stating that the PVP rewards were ready to be claimed (which was to be expected). Since then, I have not received another notification. I'm about 60% certain I'm on day 8 now of not playing and it's killing me being away from the game. In the same sense, after what i'm estimating to be 8 days of not playing I still haven't received a notification about a legendary power cell, and from reading on this subreddit the general concensus has been 7 days.

Does anyone else have experience doing this that can chime in? Should I wait it out longer? If you did this before, what stage of notifications am I currently at, and how much longer do you think I would need to wait?

Thanks!