About a year ago our website decided to go in the marketplace direction where external sellers can sell their products on our website. With this comes complexities like varying shipping costs and delivery times.
at 1st there was free delivery but after a business decision later we stopped. Now the user has to pay the shipping costs. This came with a lot of confusion and complains as the user can't understand the breakdown of the shipping cost across the multiple sellers they are buying from.
From user testing session we realised that grouping the items by seller and showing the calculation breakdown on the cart page wasn't effective. More information didn't help the user understand.
What would be a good way to make the user understand and accept the individual shipping fee and continue to checkout?