Hello Sirichai,
Thank you for your email. I have confirmed that I ordered the wrong kiln for you. I apologize for my error.
I have a proposal for you:
There is a very good way for you to have digital control with the kiln you received: that is for me to send you a digital controller. This solution actually has an unforseen benefit in that the controller will last longer since it is not connected to the kiln where it is subject to large temperature variations. However, there would be no refund for this solution. You may need to drill a hole in the kiln for the thermocouple. This is not difficult and if you need assistance I can help through emails. I myself have a kiln that is controlled in this manner.
I have set aside the controller for you and with your confirmation I will send the controller to you USPS Express so that you will not be without digital control for very long. There would be no charge for this.
Please let me know if this is acceptable to you.