unusually high data useage

I woke up this morning to find my mobile off, probably due to a low battery. I plugged it in to charge and switched it on. Once my mobile started up i received a few sms stating my data bundle has run out. I found this quite strange that my data was used up as i had never had this issue before and my mobile data useage doesnt exceed 500 mb per month.So i log into the vodacom app to purchase data and to my suprise my current bill is sitting at over R5000. Usually when my data is out i top up using the vodacom app or i use my telkom mobile modem. I always take note of sms regarding balance of data. For some reason my data useage spiked over night and my bill sitting at over R5000. And this is after one night??? I tink this is ridiculous. I would appreciate it if someone could advise on how to resolve this matter before my account is suspended. I had laid a complaint and now I am waiting for vodacom to respond. But I presume they will tel me that the data was used at a OOB rate and the vill is valid. Would I need to get my lawyer involved if it reaches that stage? I am not paying for data I did not use.<br> <br> Aaqil Kader