Hedgehog and me v 'Houdini' cat!!!

I have had a hedgehog feeding station in my garden for several years and had no problems with cats accessing the food.......until now!
One of my neighbours cats has turned into a 'Houdini' cat! All summer I have tried all sorts of tunnels,bricks,tubes,hairpin bends,double hairpin bends etc.etc. It has now turned into a running battle every night.
The main problem is that I have to make sure a hedgehog can access the station but not a cat.
This is the set up for tonight:-


One of my neighbours cats has turned into a 'Houdini' cat! All summer I have tried all sorts of tunnels,bricks,tubes,hairpin bends,double hairpin bends etc.etc. It has now turned into a running battle every night.
The main problem is that I have to make sure a hedgehog can access the station but not a cat.
This is the set up for tonight:-


“Every day is ordinary, until it isn't.” - Bernard Cornwell-Death of Kings
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I feed mine a cage/trap. There's a stick holding the trap door open at a height which allows Spikey to get in, but not the poxy cats.
Perhaps you could extend the tunnel entrance with your pavers and a bit of wood over them? Or turn the square drainpipe [?] into that corner of your wall, leaving just enough for the hog to get round and into the house. Covered with your timber.
If I can find the site I was looking at, I'll do a link, in case what I've said is like gobbledegook - most likely!
https://www.gardenwildlifedirect.co.uk/chapelwood-hedgehog-house.html
If you click on the 2nd pic, below the one that's there, it shows the interior
https://www.countryliving.com/uk/wildlife/countryside/news/a2733/hedgehog-food-mealworms/
Could you tell Houdini that please! I have seen myself that the cat backs out of the tunnel!!!
Had neither cat nor hedgehogs last night.