Default random ads after installing go locker pro

Hi,

Yesterday i installed go locker pro via appdroid, but i didn't like it so i deleted the app.
Since then, i'm getting ads on random moments: fullscreen ads after random unlocks, ads on the bottom on random apps.

Is there any way to get rid of them without deleting everything on my phone?

1 picture attached.

Thx in advance,
RobinBE.
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