Data disappearing from account

Last week Tuesday, 16 April 2019 at 12:58 I transferred R100 airtime from my cell phone number to my tablet number. I then bought 1GB data with the airtime. By Wednesday the data disappeared from my tabled and I had no data available. On Thursday, 18 April 2019 I still had a few rand airtime on my table which I bought 500MB data with. Now, the data is all gone as well as my airtime. What the hell is going on with Vodacom, *****ing our money, Data and airtime. I want this to be corrected as soon as possible.