Help with refund and stop transaction from Shaw academy

On the 27th March i received a message to say R399 was taken from my account Online purchase. I dont know how because lthese people do not have the right to take money from my account, I contacted them on the 30th march they said they process a refund. On the 3rd April i followed up they said i am not getting any refund. I asked them to provide me with contact details and adress they didnt respond. Instead they send me mail to say i subscribed to something on the 3rd and i didnt i asked them why are they adding stuff they did not respond. These people first took money when i was banking with fnb. After refusing to refund i was upset i moved to capitec now again the took money but after deduction in Niv they said they will give me 6 months free , But to my suprise they took money and are refusing to give me their contact details,I am worried that i am getting paid next week and that they are going to take my money. I also need a refund for R399. last time i escalated to the ombudsman and the out come was that i only unsubscribed and did not cancel membership i did not know the difference. i am so stressed because the bank where i leave is closed due to lockdown