High usage of data on a phone without internet

I was debited with an amount of R 3 800 on my cell phone account, when I called to inquire I was then told that I had a high usage of data on the month of October and to my surprise I was using a Nokia which cost R100 and which does not have internet. Late September I called to cancel the contract and this happened on the last month of my contract, its so surprising.<br> <br> I told them to investigate this matter cos I did not use their data and i am still waiting for their feedback, There is just no way that I could have used their data with a phone which doesn't have internet.<br> <br> <br> <br> <br>