Happy New Year ,
I had a detail look at the description and it would be nice if you can allow me to clarify more in order to get 100 % backend logic of the website. Since you have described the job scope in a beautiful manner , I have got overall magnanimity of the software and here are what we can be focused making this system:
We strongly recommend you not to go with any third party sources available in the maretplace. We will make it using either Codeigniter or Symfony. Fine with Custom PHP too. Tthe system will be enabled with an auto generated unique value everytime.
The user will be given with a limited or unlimited survey and it's questions, Graphic surveys, data exporting and number of language etc.
In questioner the text box can be with checkbox, Numeric Format Validation, radio button etc. It may takes place with Video and image sometimes. The survey can be customized by font, size,background colors.
Real-time online report features ,emailing through survey tool, CSV data export, setting off date,time , password protection are key features we will work on. Email and Chat support feature will be made per further discussion. Do you need any 3rd party API integration like salesforce or affiliate management system?
The 45 days of timeline you have mentioned are bit touch to manage honestly but we can definitely try to reach by then. Here we are a team of 30 website designers and developers so you can be rest assured by the Design,codes. We are professionals.
Thank u