Oh dear, we are sorry to hear that you are unable to place your order on the website.
You can send an email to us at stackers.sg@gmail.com to place your order. It would be great if you could also screenshot the item that you desire alongside with all your contact information such as name, contact number, delivery address.
We will send you an e-invoice for payment, and upon receipt of payment, we will send out the items.
It would be wonderful too if you could let us know why you were unable to place your order so that we can rectify the problem for future users.
Thank you!