Munnik Basson Dagama ********** debit order

These people keep on deducting money from my account without my approval.Worst thing is that I don't have an account with them.I once gave them my account number when I was assisting my boyfriend who was employed at that time and didn't have an income.I gave them my account details and they were debiting R120 on my account which I cancelled in December.I didn't know that assisting them and my ex will give them an opportunity to de***** me.Now the country is under lockdown they see a chance of de*****ing my account knowing they won't answer phones.I can't even reverse it with my bank FNB since the amount is R2000 and online reversals only permits R200.Can they please reverse my money.