Data Charges Continue

Prior to July 1st I received a sms stating that my Facebook will be free for the period to August 31st . However I checked my Facebook and data was charged ever since then I reported the incident to Cell C and they told me that I do benefit from the free Facebook the people at the technical department constantly tells me the same story over and over and it really annoys me that I'm doing what they telling me about changing to restricted background but when I check my data again data charges went off I'm so disappointed in the service that i'm getting from Cell C I mean I wouldn't phone constantly if I know that the problem persist the problem has been escalated to the validation department but I haven't received feedback from them I spoke to one of the consultants and she told me that I'm forfeiting the data that I lost because my Facebook is free I'm really not happy because all the people I ask they say they benefit from the free Facebook this is really bad service from Cell C and unprofessional in the term that this is also the 2 week I'm waiting on a reference number for this complaint.We are now in the 2nd week of Aug and still the same problem persist I hope someone can help.