How do I get back my lost data

"In December, I fell victim to phone theft, and the culprit wiped my device clean, erasing all data, files, and precious memories. Having used the phone for three years, it contained a treasure trove of irreplaceable photos and memories. Despite my best efforts, I've been unable to recover my lost data. I'm desperately seeking a solution to retrieve my information, particularly the photos, which hold immense sentimental value. Any assistance would be greatly appreciated, as those memories are priceless to me."