You can see your referral code, total referral earnings, how many you have invited and how many of your invited made a deposit at https://blaze.com/en/account/transactions?modal=refer_stats.
Or, in your profile, click on Transactions:
Then select Referral Statistics:
Your referral must deposit at least R$50 so you receive the invite reward. If the requirement is met, you receive the reward as soon as the money lands in your referral's account. See the rules at https://blaze.com/en/games/crash?modal=how_refer_works
When you send your link, be sure to tell them not to leave the page the link takes them to before finishing the registration process, so your friend will register correctly through your referral link.