someone sent me 30$ and i got only 10$ to my wallet
i see the transaction its was 30$ worth of ethereum
It's most probably something wrong on your end. Exodus does not hold your keys, therefore if you are certain that the transactino of $30 worth of ethereum was broadcasted on the network(visible using a block explorer), then you hold these funds, even if you don't see them.
You can always export your Ethereum exodus wallet, and import into myetherwallet or other online wallets to access the funds in the worst case.
Exodus is fully legit.