Laptop lost power during partition resize. Won't boot and files unaccessable

I was resizing the partition (enlarging) with gparted when about 2 minutes in there was a power cut. Now it won’t boot up and the filesystem is unaccessable.

I can see the partition in gparted but on attempting to do anything it gets stuck on “checking file system”.

“Disks” doesn’t even recognise the file system - it just shows free space where the file system should be.

When I click on the “173GB volume” in the launcher, it says “…structure needs cleaning”.

I’d appreciate if anyone can advise me how to get my data back. Please bear in mind I don’t have any USB drive large enough for copying the contents on the hard drive.

I’ve moved this to the https://community.ubuntu.com/c/support-help-requests category because this site isn’t designed to take tech support questions. Sorry. I’d recommend using one of the official support channels listed on the Finding Help page.