form field sizes too large

I have a number of input forms built using Blueflame and joomdonation forms. the fields are not resizing or wrapping round so look terrible on the iphone is their anything that can be done

rotating the iphone to landscape mode works but If this is the solution I woudl like to automatically rotate the  page

thanks

What it URL of the site?

www.mobitaskr.co.uk

Used extension has text areawith hardcoded width of 100 characters. The same is true for input fields:
You can override it with css like