Monthly Renewal SMS Incorrect

Hello Smarty folks - When I joined Smarty, I signed up for an unlimited plan, on auto-renew. I then changed to another plan, 16GB per month.

Each month, when my monthly payment goes through, the SMS I get thanks me for my payment for my Unlimited Plan, so I guess it's using the original monthly plan I had. 

I know now I am paying for 16GB, but when I first had it, I did have to login to my account to make sure I was paying for the correct plan. Not sure how many other users this impacts.