Hey Wakizashi14,
Thank you for reaching out to us and I am sorry to hear about the issue you're having with credits.
Correct me if I'm wrong, but I understand that you have purchased credits that were not delivered. If that is the case, please have a look at steps outlined in the following article, and we will be happy to assist you!
Sorry to hear you did not receive this in game content. So we can get this looked into, please feel free to contact us with your account details and an image showing the proof of purchase for this product.
You can currently contact us via our Twitter account or our support website as advised here.