Woocommerce & Wordpress development

I put together websites from themes and then struggle to get them to do things at are client specific. I'm looking for someone to help me with a current project that involves Woocommerce then ongoing support if needed. Any info relating to previous work would be helpful.

I'm currently trying to implement with Product Add Ons and Composite Products so examples that you have developed on these would be very helpful.

I have these examples that aren't working properly yet.

https://thepinkbanana.co.uk/product/giant-blue-number-2-helium-balloon-two/
https://thepinkbanana.co.uk/product/giant-blue-number-1-balloon-one/

The user needs to add two numbers to a box and then pay for delivery. The product picture needs to change when they add another number or another image gets added to the collection but then this needs to feed over to the shopping cart.

This may lead to more work on the same website as I need to add collections of balloons to one box and I also have other sites that I need help with development as well.

Regards
Bevan