Breach of contract

I upgraded my contract which gave me more monthly data per monthly. The additional data has never been allocated for the past three months while Telkom has been debiting the full amount. I have called a million times and lodged complains on the website but the issue is still not resolved. This a utterly pathetic, a serious breach of contract which leaves me in a inconvenience position as I am working remotely!! I have spent a lot of money for additional data.