Over charging

Good day,<br> <br> My monthly bill as per my contract is R318 .My data bundle ran out so I purchased a 500mb data bundle and had been soft locked due to a limit I added on my contract. My bill currently is over R1240. <br> <br> This is pathetic and time consuming as I must make the effort to resolve a problem that vodacom should have dealt with. The vodacom app is useless and there's no point even having it. If this does not get resolved soon then I'm willing to cancel my contract with this **** company