Client Services SHOCKING!!!

I recently bought a new VW. This morning I phoned the VW client services call centre - O MY WORD!!!! SHOCKING!!!! I want to change my debit order to EFT and the date to be on the 25th of each month. I must hear, I cannot change this as per the National Credit ACT etc. On my invoice it states the banking details in order to pay EFT. On option is that I can pay EFT, BUT I must phone in every month to tell them that I have made payment - and this I'm not going to do. On all my vehicles I have ever owned, I have paid via EFT, I pay more everything and on the 25th of each month, even if it's a holiday or over a weekend. Where does it state, that I'm not allowed to make EFT as per the National Credit ACT and why can I pay EFT, but I must phone VW every month to inform them?????