@luna4you - none of us are public mobile representatives. We are all customers like you trying to help one another here on the forum.
If you after you check your My Account without refresh issues, OR call 611 to check the data balance you have, and you still show you are not on the new plan, you can go ahead and schedule a "plan change for next renewal".
Don't choose 'change now', because you will not get any prorating funds in this current cycle back.
The plan is available in My Account :
Also, try tapping the highlighted area when logged into self-serve for a refreshed page version: