I asked them and they say for bad screen and errors it is bug you can use App. for money we can't do anything

Maybe people must send their money to safer wallet
Asked them how is it possible to breached your account even with 2FA. Somehow they can give you some reasons why it happened.
Ask also for logs as maybe there's a
"mole" around you that you are unaware of.
Either way, don't use blockchain.com now.
OP there just gave an update that everything is fine now on his side.