Extra AC

[kiakan]

So I just made a few AC purchases, and somehow I've ended up with more AC than I paid for. I had no intention of exploiting anything. I bought 3700 AC and then realized I was 200 short. So I went to buy 200 more and it went though normally. After logging back in, I have 6900 AC when I only paid for 3900. I will not spend over the 3900 I got. I was never charged extra for this. I don't want Sega to think I did something bad. I'd like to contact Sega's support about this but I'm not good with Japanese.

Have things like this happened before? Are they common? And can I get in trouble for this? Thanks.

[wefwq]

Rare case if it's common they're already out of business, are you sure that you only get charged for 200AC?
It's their fault in the first place naturally you won't get in trouble, but depends on how they respond to this kind of stuff, or rather are they even notice this kind of thing happen at all anyway.