i want to change the header image

Hello,
i want to change the header image of this links:
http://www.nosahealthcare.com/categoria/pies/
http://www.nosahealthcare.com/categoria/propolea/
http://www.nosahealthcare.com/categoria/acn-free/
http://www.nosahealthcare.com/categoria/higienizantes/

i want to put a different image in each link. They are woocommerce category pages, i think.
Another developer couild archieve this in this url:
http://www.nosahealthcare.com/categoria/prevenir-piojos/

Can you please give me the steps i must do? Thank you in advance.