Hello, Maria!
We are sorry you had such an experience. From our side, we always try to do everything in our power to help, but we don't always have the opportunity to reward all the cashback in full. Since we have credited you the refund for your first purchase, we cannot credit more. We have sent a request to our partners and will let you know when we receive a response. We very much hope that it will be positive.
Cheers!
The LetyShops team