Telkom says there is nothing they can do

Every month I load R360 Telkom mobile airtime to purchase their R359 data bundle, yesterday I have loaded R360 to purchase the bundle however it did not go through and it failed showing me I did not have enough airtime yet there was enough airtime shortly after it sent me an sms to say my balance was 0 which I know when I get that sms it is because the bundle was loaded, today being the 17th of June it sent me an sms to say my balance is lower than R5 and then it says my account balance is R0. I tried checking my balances but it shows me nothing so I called Telkom customer care line to query what had happened and they told me it used up my airtime as data and the bundle was never purchased and then told there is nothing they can do, so am I just expected to just buy another R360 which I dont have the funds available to do so. This is absolutely terrible because its not my fault that the bundle didnt go through like it does every month.