Hello,
I have answered to that post. Look there are other peoples who use completely different themes and even the default themes and have the same problem https://wordpress.org/support/topic/square-credit-card-number-field/ and it seems that plugin developers just ignore these requests. We are not responsible for the third-party plugins. If you want you can submit customization request here to hide developer who will take care about this plugin issue. Theme support does not include third-party plugin customization.
Regards