Data not delivered as promised with Smart Tab

I bought the Vodafone Smart tab on a pay as you go contact which includes a 200 Megabyte free data bundle monthly for 6 months as part of the deal. However, I don't get the promised data with the start of each month, instead I get it only about a month after and when I top up my airtime. So last month on the 8th of March I loaded R29 airtime on my phone and received an sms that if I loaded another R29 I would receive an additional 200 megabytes, which I immediately did. I then received an sms that I will only receive this data the next month, ON the 6th of April 2016. I then realised that they have cleverly ******* me, and that it wasn't additional data, but merely the data that I was supposed to receive anyway. <br> On the 6th of April at 07:00 Am I noticed that this data wasn't loaded. I called Vodacom and they had numerous excuses. They did phone me that same morning ensuring me that they will credit my account with the monetary equivalent of 200 mb. Then about an hour later I received an sms that they will send it whenever they feel like it and that I may or may not receive it by the next day. I requested them twice to escalate the matter but I obviously get laughed off.