Data limit lock not working

This is what i found on the SmartCall website "Prepaid customers using Anytime, URL, Night Owl or time-based data bundles will be opted into the OOB data limit lock service and their limit set to R0."

My airtime was utilised after my data bundle was depleted. when I went to *135# to activate the OOB data limit lock the option to activate was not available, instead there an "Opt out" option. when I checked my current limit it indicate "R0.00. If my limit was already set at R0.00 why was my airtime depleted?

When I called the customer Care they informed me I had to activate the OOB data limit prior to the data bundle running out. I explained that it was already set at R0.00. A new regulation was issued and Vodacom is simply not complying.