You could try a push (plastic) fit T need to measure fitting to see if it would fit once copper pipe is cut ,and you have play in the copper pipe to allow access to fit push fit . it would get you out of trouble .
I see you had to remove engine mount for access ,engine mount may be slightly out of align /under stress from original position.
trying losing bolts rocking engine by hand gentle then re tighten bolts up.
I had this problem when a clutch was done on a fiesta
Worth a try
They should check the trye with the correct operating pressure in the trye not 60psi. As that high pressure could push the the wall of the trye hard up against the rim of the alloy and seal it. When drooping the pressure back down it could cause the tyre wall just to move back of the alloy rim...
washer jets will freeze even with antifreeze in the washer bottle. Most of the time the jets freeze due to moisture in the air
That is why the good old electric washer jets where invented
For safety may be worth having a emergency light fitted as well, so in case of power failure for any reason you can see what you are doing .
Or at least have a torch stored in EASY place to access.
If you cant remove water for soldering or awkward to get at to solder, I would go with compression fittings with a smear of jet blue(other makes available)on the olives
Face of belt drives the water pump, in case of water pump failure the belt will not be damaged (in theory) if it was a tooth drive on pump it would.
I cant remember but some cars used the water pump for the tension of the timing belt(been some time now) lol
The main live battery lead has a fuse built into about 150 amps which can not be replaced part of the wiring .
To check this is ok follow the main live lead down to the starter and with your meter see if you have power to it where it connects to the starter
This will prove if fuse has blown or...