Issue with FC Mobile Webstore Purchase (1000 FC Points Pack)

I tried to purchase the 1000 FC Points – 225 BDT pack from the FC Mobile Webstore, but the transaction keeps failing. Every time I attempt to complete the purchase, it shows a failure message and the payment does not go through.

I am not sure why this issue is happening, and I need a proper solution.

Please check the problem and help resolve it as soon as possible.