Training: Instruction to develop new skills.
Hey there, Raisul Maharub
Thanks for confirming this.
Please can you sign into your Microsoft account on the help & support blade here: https://portal.azure.com/#blade/Microsoft_Azure_Support/HelpAndSupportBlade
Please can you create a support request using the "Create a support request" button at the top
Please briefly describe the issue you are facing, then select billing and the Azure free trial subscription.
The support workflow does provide you articles that try and resolve your problem. Please scroll down to the bottom of the page, where it shows a tab saying "Contact support"
This will provide another option to create a support ticket.
The support team can look into your account and see exactly what has happened.
Hope this helps,
Nathan