Mtn unable to understand their own packages

Today is friday 7th december. On November 12th i got my data as per my contract- 3gb +3gb promo data plus 6gb of night express data. On or about the 18th november the 3gb promo data "disappeared"/ was ******. On the 20th i went into the mtn shop in the roadri centre, 3 rivers and complained. I was eventually told it would be fixed within 3 working days. Yeah, sure. I'm still waiting. 2 days ago i got an sms telling me my problem was fixed and if i still had a problem i had to wait 48 hours and then phone (what takes 48 hours after a problem has been solved???). My data is still missing, my problem isn't solved. Do i need a lawyer?