What a troubled life you lead .
Falcon Workshop Supplies 12 PACK OF METAL 5mm (M5) SHELF SUPPORT STUD PEGS, KITCHEN CABINETS STEEL PEG PLUG IN
https://amzn.eu/d/2BAKxDk
Post is a bit garbled but looks like you have employed chancers rather than pavers , if the blocks go in at the height set in photo the rain run off will be into the house thru the air vent shown in the photo causing damp and possible flooding breaching any dpc.
You can have your router ground floor and use a Wi-Fi extender to give a wired connection to the loft , I use one to provide Wi-Fi connection to old Mac which only has wired option.
Means you don’t need a spare power socket by the router and is a tidy option.
https://www.argos.co.uk/product/1115138
https://www.screwfix.com/p/cramer-cra30200en-acrylic-mineral-bathroom-cleaner-100ml/127fn
A friend managed to polish out a deep score in plastic with this .Easy to use .