Deducting money on the 18 th of December

Russells deducted money from my bank account on the 18 th December without permission. That money was part of my Christmas budget. The deduction date is only at the end of the month. I've phoned them they said to pay it back within 48 hours. It's now 10 days and nothing has been paid back. My festive weekend was a big @%?@. Thanx for nothing Russells.