I can pay using card to upgrade account.

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Hi 안준상,

Thanks for reaching out to Jform Support. Unfortunately, our Korean Support agents are busy helping other Jform users at the moment. I'll try to help you in English using Google Translate, but you can reply in whichever language you feel comfortable using. Or, if you'd rather have support in Korean, let us know and we can have them do that. But, keep in mind that you'd have to wait until they're available again.

Now, let me help you with your question. I went ahead and checked the status of your email address and I can see that it's currently on the Guest account. Please make sure to create a Jform account first, you can sign up for an account here. Once done, you can then try upgrading your account. Here's how:

1. On your My Forms page, click on Pricing in the blue navigation bar at the top of the page.

You can also upgrade your subscription on your account’s Upgrade/Billing page.

2. On the Pricing page, choose the plan you want to buy.

3. In the popup window, choose either a Monthly or Yearly payment schedule and either Credit/Debit Card or PayPal as the payment method. 

Here’s an example of the Bronze plan:

After you click on Continue, you'll need to enter your Credit/Debit Card details.

If you choose to use PayPal, you’ll get redirected to the PayPal payment page to complete the payment. Check out this guide for more details about upgrading your account.

Let us know if you need any more help.