So go grab a coffee and watch an episode of your favourite TV show and come back later!
EDIT: It was not within the last month, it was the end of June or very beginning of July, before Pokemon Go was released (that is what increased my data usage).
I am having the same issue, but I am in BC. I have been on a $20.00 a month - no data plan (or pay as you go data) for a long time, but have decided I would like the 2 gb $50.00 a month plan currently being offered. Like the gentleman that started this thread, when I go to self serve it is not listed there?
I did recently get a new phone and now have a $330 tab, but my plan remained the same. It was about 2 months ago.
Derek - I am the person from BC with the same issue who posted above. This morning I went to the Koodo Facebook page and sent a private message. Someone got back to me within 10 minutes and within half an hour they had changed my plan to the 2 gb - $50.00 plan. Try that - this thread has been going on forever with no solution. Good service over on Facebook.