Social media scraping tool

Hi, i need someone to develop some software that will help me scrape social media (mainly facebook) for public posts using keywords.
1. Keywords such as "new business" "got the keys" "moving premises" "new shop" etc
2. Post must be from the UK
3. Must be able to specify a time frame, example - in the last hour or in the last 2 hours etc
We use the posts to sell electricity to new businesses, we have lots of competition in our industry so speed to lead is the main thing that is required.
This will be an ongoing project as FB changes the way we can scrape/search so we will need the software updating from time to time.
I will upload a small sample of the data i am trying to scrape, i understand that all the contact details will not be able to be scrapped but it is the initial post with keywords that i require.
I will require a demo of the system working before any payment is made.