I can create a process that will accomplish your goal, providing you with the ability to (a) migrate your products from your Wordpress website and (b) continually create, update & manage the products within your Facebook page. The solution I would create would be original and thus would cost much more than 20GBP. There may be a completed solution that you can purchase for 20GBP, but you would specifically need to request a completed solution that you could simply purchase. However, should you be interested in an original solution created specifically for your business, I can do that for you. You are welcome to call/text/message me to talk more about schedule and rates.
Have a great day.
Jehan Semper
I solve problems. I have more than 20 years of creative and technical experience working with Perl and PHP. I am interested in working with you. I am willing to provide you with 4 hours of programming time for a nominal fee of 51GBP to give us an opportunity to experience working together. Call/text/message me with a task you'd like to have completed.