I agree with the above - especially if you did a "Quick" format. Most of the data will still be there, if not over-written. It is just not mapped in the allocation tables, and those disk locations have been marked as available - ready to be written to. But as noted, as soon as the drive is used again, recovery becomes less and less a possibility.
For sure, the drive should be installed as a secondary drive, or installed in an enclosure attached to another computer. Then try the recovery programs. Do NOT use this drive as a boot drive because the OS will create a bunch of temporary files on the boot disk, overwriting data in the process.
Of course, hindsight is, or better be, 20/20. If you had a current backup, this would not be a big issue.