Cannot modify Vendor Details, Shipping and Billing Address and Price of product in Purchase function

Cannot modify Vendor Details, Shipping and Billing Address and Price of product in Purchase function

Hello support, 

On SDP on demand:
I find there is no way to edit/edit a vendor's information, (if you have made a typo), no way to modify/delete shipping and billing addresses once is entered

also there is no way to add a new product, or change a product's information (most importantly the price) after it's added. 

is there really no way? 

                New to ADSelfService Plus?