Vodacom ****s us

I had a contract of 2 years with Vodacom for Samsung phone.every month we are paying R200 and they put airtime of R120 and R60 to the onother phone coz it two phones .the problem started last year 2019 sometimes they put airtime sometimes not i thought coz I'm not using this contract no daily and i wanted to call them but i forget. Now thise lock down i have aworse scenario that i won't forget from Vodacom. They deduct R1400 from my husband account since he is the one who is paying the account. When he inquired about it they said we subscribes data on the 28 March.suprise surprise i checked my phone sma coz i use the sim card only when its month end from the 1st of the month until that R120 airtime finish.then i go back to my original network normal this airtime time does not even last 1 week and sometimes they don't put this airtime as i said before. What suprise me is that i checked the balance on the 2 April they send it to me was R109 and 1.44G of which i don't understand about this gig and i thought coz they rob us not puting airtime every months while we are paying it and maybe they wants to makes things right because they are robbing us and its lock down they want us not to suffer. I was wrong the nightmare of today They deduct very huge amount. We don't know about this subscription. I started to use thise simcard on the 2April and subscription was done on 28 March