I signed up to study with IQ academy and agreed on a debit order of 524 monthly

I signed up to study with IQ academy and agreed on a debit order of 524 monthly. Paid on the last day of the month. To my surprise I got debited a different amount in the middle of the month 17/12/2025. Which obviously is not the last day of the month. So I called their contact center to ask. I spoke to Olwethu who then tells me there is an email sent to students that in Dec debits will go off mid month. I informed her I never received the email. Now I also ask why was I debited a different amount to what I'm supposed to be paying she tells me that's in the terms and conditions of my contract which I actually never received even on the sign up day. So she continues to say the consultant I signed up with accepted those conditions on my behalf. I mean why do their consultants do that? It's *****. I want my money back. My money was taken on a non agreed date and it's not the amount I agreed on.