Unsent payment and stolen currency


from my litecoin core wallet, which I turned on after two years, I sent almost the entire balance to my iPhone wallet. for the transaction it is written that it conflicts with the transaction of 310484 confirmations and I have no confirmation. it was last weekend. at the same time, the total balance was sent to two other wallets (I don’t know the addresses at all), so probably someone stole my money. how should I proceed please?

Which iPhone wallet app are you useing ?