Vodacom Data Limits Don't Work!

I have a data contract with Vodacom. I also have a monthly data limit of R50 which is supposed to ensure that once my data bundle is exhausted (and expensive out of bundle rates kickin), my data device is supposed to lock once R50 worth of data has been used. Except in January 2015 I received a bill of R5,000. I reluctantly paid and have been trying since March to get a written explanation from Vodacom as to why my limit did not kick in when the R50 limit was exceeded. <br> <br> Regrettably even when the matter was escalated to \customer care escalations'