Incorrect amount on debit order

My bank account was not debited for the month of December. My statement thereafter reflected that my account is in arrears. So I called in to enquire why the debit order was not active. Game apologized and said it is a system error and that I qualified for a holiday on my payment in December and that my account is not in arrears. Now they have debited my account for December and January. I’m am very disappointed with the level of service at game given the fact that we pay such high interest rates and unnecessary additional charges. I will not be shopping at Game anytime soon.