@Sindibad !!! You need go to Dave, he is on this phorum, in times magasine etc, legit expert - he is recovery many wallets !!!
I exact know, what he is can help you !!!
Detail about David service https://www.reddit.com/r/Bitcoin/comments/8pmlog/dave_from_wallet_recovery_services_does_it_again/
https://walletrecoveryservices.com
Also, you can dump wallet.dat private keys with this software
https://www.thegrideon.com/bitcoin-password-recovery.html
I was maked a screen for you for test, can your wallet dums privkeys or problem more serious

(DO NOT FORGET DISABLE INTERNET CONNECTION ON YOUR COMPUTER THEN YOU WILL DUMP PRIVKEYS !!!)
Yes, I'm intermediate, but, I WAS GIVE HELP YOU Many other services 80% - are scam projects,they will torment you in every possible way and then they will get the most out of you for their " help". Please, send me 100 BTC after you recover access to your wallet. my wallet for helping in commets
My wallet address bc1qg3th0ps7vyglrap74xkapq50aqyv4uccuvcdx9

No one else can't help you like Dave !!!---------------------
I think you need try run this method
https://github.com/cryptofun/honey/issues/17Problem like yours !!!

How to run this method
https://bitcoin.stackexchange.com/questions/4203/how-can-i-export-the-private-key-for-an-address-from-the-satoshi-clientLook inside your walet.dat file with hex editor, and say find you privkey or not. If yes, I will give your a link for python scrypt what work offline and you will can making WIF import format of hex privkey for importing WIF to electrum walleet.
____________________
I can also help you manualy dump privkeys with hex editor for wallet.dat file and after import privkey to new wallet.... Edited - You cad do it yourself with this video:
https://www.youtube.com/watch?v=AXiIrj4LawE
and this additional 2 messages:
https://bitcointalk.org/index.php?topic=4413938.msg39301607#msg39301607
https://bitcointalk.org/index.php?topic=4413938.msg39306816#msg39306816
BUT DO NOT PASTE YOUR HEX PRIVKEY ON ANY WWW SITE'S.
MY INFORMATION WAS HELP YOU
?? Thank you so much for your comment,
I have tried 90% of what you mention, I will contact this guy to see if it is possible to meet him in person.
Thank you again and for sure I will send the reward.
Hello.
Thank you for your answer.
Dave usually takes 20%, but you have the right to bargain with him(and I'm sure it's better to do it), since your problem is not so difficult for him, and the amount in your wallet is very large. But first of all, look at the hex editor, will you find the private keys, because if you put it on, maybe you don't need to go to anyone, write here, I'll send you links to scripts that convert your hex key to a format for importing to electrum.
Yes, contact with Dave is relay good movement, because hi is relay legit and professional.
Good luck !!!