Preventing me from using my paid data

I have bought Once-off LTE/LTE-A Anytime Data in January 2018. At the end of January 2519mb of the 10gig was left. On 02/01/2018 the new data from my contract kicked in. The 2519mb IS NOT USED any longer and will expire on 23/02/2018 I have contacted the call centre regarding Once-off LTE/LTE-A Anytime Data I have bought in January. They told me that is the way it is. I asked to speak to someone about this. I was told a manager would call me back. Up until now I have not heard anything from them. Since I have paid for that 2519mb that is left, I have a right to use it first before starting with my contract. Telkom, why are you not giving me my data ?