Call centre ****

So I have a debi check wanting to go off my bank account instituted by a company called Nupay. Now I avoid taking any sales calls. On the contrary it is a clear no, and if they want to explain I cut the call. For the last 2 weeks Stango Traders which is apparently a call centre is trying to put a R95 debit order through. I spoke to a Mr Naidoo this morning apparently he is the owner and asked me if I have received calls, which my response was I cut the calls and he said they will cancel. I feel it is a **** as I have not approved anything. The scary part is that they have your ID number. Stanley Govender seems to be a director. No contact numbers or email adress