promotional data not being credited

I bought a Vodacom tablet on 31/05/2015 and I was promised 200 megs of promotional data every month for a year. For the first 6 months the unused data was carried over to the next month with a maximum of 200 megs carry over.<br> All was fine and I received my data each month until the 6th month (ie 1 December 2015) when I stopped getting my monthly promotional data.<br> I logged a service request A1-XEXQ-S8N2MO .<br> <br> I received my monthly allocation in Jan 2016.At the end of February 2016 lost more than 100 megs which should have been carried over to March 2016 . My February 200 megs promotional data have not been credited to me . Today 5th March I spoke to the customer care and they logged service request S3-GPXD6-6U3P and was told me to wait 24/48 hours or maybe longer and they would look into it. They suggested I go and buy data. I have been to 2 Vodacom shops but they cannot help because they only deal with contracts.<br> All I want is the monthly 200 megs of data for 12 months,