@DebbieT Then it's possible that repling YES to the text offer to have the plan change at next renewal to the $40/15GB plan did not work. So you can login now (use incognito/private mode, of course) and select Plans/Add-ons (left side of page), then Change My Plan and scroll with the arrow to get the correct $40 plan as there are two and click Change at Next Renewal option as PM doesn't prorate/refund for days left in your current cycle.
BTW, the change in speed from 3G to 4G can take upto 48 hours to come in effect.
Nope. Not a cache issue. I've logged in with a different browser, and with incognito mode. Info on publicmobile is the same - the old 3G/1GB plan. If I speedtest on my phone I am still only getting 1.3mb/s down.