Form doesnt fit on iphone 6 or Iphone 7

For some reason my form doesnt support or display well on iphone 6 & Iphone 7. please check attach picture.

I have tested your form in an iPhone emulator and I can see it displays properly, I have also tested in an Android device and I can see it works fine as well, here are some screenshots about it: 

I can see you've already added the Mobile Responsive widget to your form and that you're using the default embed method, could you please try embedding the iFrame code of your form, here is the guide that will help you to get it: Getting-the-form-iFrame-code

Please do let us know how it goes.