Holy hell!
Ngl that's almost unbelievable. If I were you, this is what I'd do.
Upon realising the hack, immediately contact the bank to lock down my account to keep my money safe. That's priority zero.
Then disconnect the internet and turn off ALL electronic devices. Go out and buy a new flash drive if you suspect your flash drives might be infected. Then, get to a trusted friend/relative and get a fresh linux OS boot drive. Go to your apartment, boot from the OS and wipe the partition table itself of the hard disk. Install the linux OS and test drive it for a few days. Use your friend's internet if you think your router is hacked.
If your device looks fine, now let's turn to the router. If it's provided by ISP, call them and inform that you qre locked out of your router. If you can, buy a new one. THEN ONLY CONNECT YOUR LAPTOP TO YOUR NETWORK. DO NOT CONNECT ANY OTHER DEVICE BACK FOR NOW.
Now your phone. Buy a new pixel, use your now cleaned laptop and network to install GOS. Then configure that phone to use your network. Throw away your old phone, preferably destroy it to get rid of sensitive info.
Now that you are connected back, you can lockdown your PC and mobile to a high degree with firewall and such so that other devices in your network can hack back in. Still, if you worry replace ALL smart devices in your home once network is clean.
BS: DO NOT EVER CONNECT INFECTED DEVICES WITH CLEANED/NEW DEVICES. TREAT INFECTED DEVICES LIKE A BIOHAZARD.