REPEATED PROBLEM: AIRTIME GONE WITHOUT USE

My monthly airtime on 31 December was R689.55 and my data was 70.34MB at 15:56 and when I checked on my balance later in the day at 20:48 the balance was now R628.92 and my data was 0.99MB (I have screenshots of this). I had not made any calls on that day (or made calls for several days prior to this) and my mobile data is always on.

Incident 2: 31 December 2018 (airtime depletion) and now once again I am faced with the same problem. I had R694.24 airtime and 62.88MB data on 31 January 2019 and on 1 February 2019 my airtime balance was R456.00 and 62.75MB data.

Incident 3: took place between 8-9 February 2019. I had R456.00 airtime and 20.61MB data on 8 February 2019 and on the following day I had R454.66 airtime and 3.01 MB data. In all three instances I have not made calls and have had access to wi-fi and I have screenshots. I WANT MY AIRTIME BACK WHICH YOU TOOK IN ALL THREE INSTANCES WHICH AMOUNTS TO R300.21!!!!Can you contact the account holder (# given) on Saturday 23/02/2019 during this time 08:00-10:00.