if your wallet got hacked by someone, i think you should use other wallet instead, it's just not worth it risking your money over having the same wallet again.
moreover generating wallet is just very easy so don't sweat about it and just use the newer ones instead.
Exactly, what is the point of trying to restore or secure the same wallet that has been hacked and your funds were stolen? for that to have happened that means they own that wallet now too since they can easily reimport the wallet and reset the password again. I don't believe you can change the passphrase and if that is what they have, it is better for OP to just create another wallet and many options available too.
Using a compromised wallet is just equivalent in giving your money to the person who has previously accessed you wallet. There's no point in securing a compromised wallet because at the end they will just end up getting a way in accessing it knowing that they hacked it from you. Creating a new wallet or upgrading to a hardware wallet will be the most logical thing to do because the chance of you being targeted is higher now since the previous wallet you have owned is hacked, The hackers see you as a vulnerable person that they can exploit. You can just consider the wallet that is stolen as a hard lesson for you OP because there's no chance that you can get it back.