Ahh I forgot, can I get my $15 back?

Last month I used my credit card to get 1 month of WoW and it expired September 29th. Well I played for maybe 2 hours last month and I just saw that there was a $15.00 charge on my card. Then I checked at it said it renewed Wow.

The last time I was on was before September 29th. So is there any way I can get my money back? I really can't spend the money right now for a wasted month of WoW.

If I don't get any replies tonight I'll have to call WoW and my bank because I will not accept this.