Trying to fix leaky tap. Screws absent, so confused!?!?

[MissTabs]

I’m trying to fix a leaking tap in my kitchen. I’ve located where the grub screw should be but it’s just an empty hole. I’m looking at it with a mirror and I can see the screw rails on the inside of the hole and at the bottom of the hole a little copper dot. I’m in a new build and this is the first time I’ve touched the tap to work on it.

I’m now assuming the tap hasn’t been installed properly as the grub screws are missing. But I’ve tried pulling the tap heads off and they won’t budge.

What am I missing? Are there screws or aren’t there? How do I get the heads off?

Please help!

 

[MissTabs]

 

[MissTabs]

Ok so I’ve got this far but now can’t get this part to unscrew.

 

[PETE 123]

fit correct size socket not grips and undo note may be reverse thread.

 

[Aquarius]

As above or perhaps a box spanner set. Unusual not to have a retaining screw though.