Missing data

On the 05/4 2021 around 10:40 in the morning , loaded airtime of R55 and R10 and R5 which amount to R70 all together. I with that airtime I bought data on my phone ofR 70 .Which was 2GB for 7 days .which showed activated on my phone which I'm supposed to use until 2021-04-11 at 23:59:59.,to my suprise on Tuesday morning , I have zero data no notification to indicate the balance before it get finished.and when trying to call vodacom to try to understand what happened to my data no answer, this is a broad day light *******, I didn't not suff any net as the phone is parental locked.