I'm sure you used exchange to send your ETH to Dadi contract. That's why you didn't recieve ETH back. If you were using your own wallet ETH will bounce back instantly after transaction fail to reach smart contract. So, deal with the exchange from which you sent the ETH during the sale. Not related to Dadi.
I sent in the right time and the first people who sent for your address , but I get failed after 50 min , you addres showing all the value is still pending and its 0 value in $ , but you still saying its finished . I dont understand how its come , you are lies for all of us , you already have the people who you want and you make them send for other address , but at the same time you keep saying your right address is the one which end with 914E , go for https://etherscan.io/address/0x29880855d419c6fa0e8c7fdfd985c80f286d914e
everything still pending and the value is ZERO !, so you are liers , you did used other account for other people , so because of this I feel sorry to myself to share my ID proof in your website , I have no way to contact you so please I want you to remove all of my account and all of my file with my ID ...etc . OR I will go for court .