Mole Deterrent

I had a garden makeover in May this year & these appeared next to a raised bed a few weeks ago. I assume they’re mole hills. I flattened them down when they first appeared but they ‘popped’ up again a few days later. I’ve repeated this several times over the last 3-4 weeks.
If a
mole is the culprit does anyone know of any humane deterrents?
If a

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Rootle around in the soil of each tump until you find the tunnel. It will be just a little wider than the size of the pickled onions.
Push three pickled onions down each tunnel and re cover with the soil from the tump.
Wait.
The moles will not come back.
If you live in Derbyshire, as I do.
If you live in Derbyshire, as I do.
If you live in Derbyshire, as I do.