If you are still experiencing issues related to Helix credits, please don't hesitate to contact us. Note that for billing issues such as these, attaching a proof of purchase to your case will allow our support team to better understand your situation. This is how you can recover the proof of purchase on PS4, Xbox One or Steam.
If you didn't purchase Helix Credits recently, but the amount displayed is wrong, this article might correct the situation for you.
If you need assistance sending us this proof of purchase, you'll find more information in this article.