Data theft

I have bought 1gig ofdata on the 24 June 2019 at 10:10 ...by 12: 10 is was gone as well as the balance of 30mg that was left on my phone...Vodacom's reply was it was used up by updates and downloafs...I have only received 4 photo's on whatsup and no updates were done since my phone is set up to only do updates on wifi....this is plain and simple THEFT...i have been using thiz this data purchuse for the last 3 years and this is the 1st time it disapaered within an hour...it normaly last at least a ereknor two....THEFT