1kg Bakels Gluten Free White Mud Cake Mix

I followed the directions to the letter but was very disappointed with the results. I made a 8inch square. Cooking time was more than double the stated time.
I used 1 x 1kg packet. I will not be using the 2 x 1kg for a 10inch cake I was making for an anniversary. I would like to return them for a refund.

Thanks it arrived one pack was popped and some came out I put it in a zip lock bag I hope it won’t be off or stale but let you know