Unauthorised dedcution of money

Mutlichoice owes me more than R1000 that was deducted from my bank account that was not supposed to be deducted but after many emails and queries I still not have an answer as no one returns my calls or my emails. It is close on a month and several calls later and still no joy. They are very quick to deduct my money but it was not authorized and now I am battling to get my money refunded. Truly pathetic. Please can someone call me and let me know when I can expect a refund.