How to recover deleted photos on One M9

Dear all,

I am here asking for help !!! Today I made a big mistake that I deleted a few photos that very important for me. It's just by accident. Right now, I am looking for a solid solution to help me recover the deleted photos, preferably do it free. Paid is OK if necessary.

I already tested Recuva and PhotoRec, none of them work in this case. Please help!

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