Thank you so much for your interest in our game! We're truly sorry to hear that you're experiencing payment issues on the platform. This must be incredibly frustrating, especially during a sale period.
Regarding your questions:
1) Alternative Payment Methods:
Unfortunately, we currently don't offer other direct purchasing methods.
The "400 error" you're encountering is quite frustrating, and since your bank confirms everything is fine on their end, it might be a temporary technical issue between the platform and the payment provider.
2) Extending the Sale:
While I can't extend this specific sale period, I want to assure you that we regularly run promotions and discounts throughout the year! We understand how disappointing it is to miss out due to technical issues beyond your control.
Thank you for your patience and continued interest in our game. We truly appreciate your support!
Warm regards,
1UP