SHJ,
My commiserations about your drive failure and potential data loss. I'v had three drive failures over forty years, two on Macs and one on a Windows machine. Luckily, I had relatively recent backups and the recovery was not too painful and I didn't lose too many files.
This would be a good place to start:
https://www.techradar.com/pro/mac-da...rvices-i-found
I would be interested to know what caused your HDD
and your backup to both become corrupted.
Finally, once you are up and running again, there are these two complementary services:
Permanently online, automatic, cloud backup
Backblaze
Local bootable-clone backup
https://shirt-pocket.com/SuperDuper/...scription.html
I highly recommend both. They have saved me on several occasions.