Hi Cinthya.
We are sorry that you have such a situation.
It is true that there are incidents, where the cashback is not registered, but we never leave the users without a solution and answer. We see that you have the requests for the lost cashback in your personal account. Follow their status, please.
If you have any questions, do not hesitate to contact us through the Help section of your account.
Sincerely,
LetyShops team