Vodacom *****ing from there customers

It's now the second time in a row where I buy 100gb day+100gb night data I loaded this data on the 11feb it's now the 23 Feb and it's already finished how is that humanely possible and when I go on the vodacom app it tells me that I've only use 23.10gb what happened to the other 77gb of data vodacom is robbing and *****ing from there customers then when you call the vodacom help line they will take it to the accounts department and give you a 100 rand refund to buy data until they can get back to me to see where that 77gb went to come on guys it's not hard to see that vodacom is *****ing from its customers!!