Again!

Another R100 airtime gone! I was browsing the Wish App tonight, and all of a sudden I received an sms (see pic) saying I was depleting data at out of bundle rates. I IMMEDIATELY checked my airtime balance and found that all one hundred and something rand airtime I had was gone. This exact thing has been happening for months, if not years. Why can't MTN just have a setting to prevent airtime being used as data when data bundles are depleted? Yours truly..