Custom field issue

Hi this is suresh and i’m using the plugin called “Contact Form 7 Newsletter” to integrate the contact form 7 with constant contact but i have issue with the custom fields

i have used around 25 extra fields in my contact form 7 and while integration i have to allocate each and every field of contact form to constant contact but i dont find enough custom fields to link them ..

i can seee around 15 custom fields to link so my problem is i want to add more custom feilds and then show all these in my constant contact subscriber details

help me out …:(

https://ww.wp.xz.cn/plugins/contact-form-7-newsletter/