I want to update the shipping description but cannot find a way. Pls help

Hi,

Need your support.

For example:
In this link https://deltafoods.eu/index.php/product/classic-wooden-chair/

1.
I want to update the description ‘Scelerisque facilisi rhoncus non faucibus parturient senectus lobortis a ullamcorper vestibulum mi nibh ultricies a parturient gravida a vestibulum leo sem in. Est cum torquent mi in scelerisque leo aptent per at vitae ante eleifend mollis adipiscing.’ to something else, but even after going to the product description page, I cannot find a way to update.

2. Under PAY and GPAY buttons, there is another description , which I dont know how to update.

3. Under description, there is Shipping & Delivery which I want to remove. I tried making the product digital but it did not work.

Please help me solve these.

Thanks
Madhav