No communication whatsoever.

So MTN decided to debit my account with an extra R889 this month. I tried contacting them, but there is no option to speak to a consultant. When I sent an online request, they mailed me back after 4 days requesting all my personal and banking details so they can tell me what the extra R889 is for. I don't thinks so MTN. Contact me ASAP and give back my money.