Scam or fraud: Motorola Solutions — Moto M

I am using moto M for the past 1month, whenever i delete some pictures, they again reappear in the gallery within a span of a week, i haven’t switched on the backup option in google photos nor have i synced it and it has happended quite a saveral nom of time, also the phones does not have any gallery option.
How to get rid of the unwanted photos permanently?