Hi,dear. We regret that our products have not satisfied you. The characteristic of freeze-dried fruit is to retain the taste of fresh fruit without adding, except for individual fruits with sour taste, we will produce a kind of sweetened fruit. Freeze-dried strawberry, kiwi fruit and other fruits have a heavy sour taste, so at the beginning, you were recommend to add sugar at the same time, but you asked for no addition. Upon receipt of the product, you insist that there is an added acidulant and ask for a refund. The quality of the product is very good, please understand that we cannot refund for non-quality problems, and yours is still a customized order. We also assure you that the product is not added. You can go to the test, if the detection of our products have added sour agent, I will give you a refund, and bear all the testing costs.Again, please understand that we cannot refund your custom order. Wish you ave a nice day！