How to make the payment section mobile responsive?

Hello, my form looks like this on my WordPress website. (on computer)

But on my phone, the end of the form, looks like this:

Ive already tried adding to my website via "Embed" "IFrame" and "Wordpress.org" but it still shows up like that on my phone. I also downloaded the mobile responsiveness widget. Nothings working.

Thank you for any assistance you can provide, Immanuel

Solved!

Simply turn scrolling on in the iFrame code. The phone will then scroll horizontally and vertically through entire form.

Sorry for the trouble

Glad to know you found a workaround on this @ImmanuelE. 

I would also like to share you this code that will reduce the payment fields size so your users do not need to scroll: 

table.form-address-table.payment-form-table input {

    width: 98% !important;

}

table.form-address-table.payment-form-table iframe{

    width: 90% !important;

}

This guide will help you injecting the code: How-to-Inject-Custom-CSS-Codes

Hope this helps. 

Thanks alot!