App and Fee charge complain

Uber is great and convenient BUT when it comes to fees they are totally a pain and unhelpful and just dont care about the customer. They will make up every excuse in the book not to refund your money where they are in the wrong. 4 trips they owe me for but they refuse to help or understand my issue. they keep saying im in the wrong 1st issue came when they advertised that every 4th ride on your visa you get free yet they keep arguing with me that i did not enter a promo code... BUT there was no promo code it was an email saying it automatically pick up as free but never happened to me. after a while they decide to ignored me on that issue. Still they refuse to give me free ride and ive used them so many times. they say my profile shows no usage of them

other 3 issues was where the app never showed me a promo code yet there was one available but my app did not show and those rides i had to pay full price. the app has many faults and totally hate it. this also they blame me for not using the code but HOW if it is not visible to me.

im not happy with my fee experience with them neither the service it get from their office people.