Failure to pay back refund and no communication for any changes

I pre-order a game online at CNA and on the 29th of September 2017 they failed to deliver. I had to call them to ask why I haven't received the game, they told me that the games were gonna be delivered on the monday. (I had to call them, they didn't call me). So I cancelled my order and they told me that I will get my money in 16 working days. throughout the month of October 2017 I called them to get an updated on the refund, Mind you I did the calling and used my resources. They told me that my money will be in before the 27th of October. On the 27th I didn't receive any notification what so ever. I then called them on the 30th,today. They told me that they will be a delay on my refund, it will be paid on the 9th of November, again I had to call them not the other way around. So I have to accept all these changes without notification. They clearly dont understand the time value of money, I bought that game with my credit cards and interest was charged this month because the money isn't refunded and they will not refund me with interest. For a company suffering at the moment this is really not a good look. Ref: ********** 2496/GO