Hello Amelia,
Sorry to hear of your issue.
The fact is, you can pontificate, assume, guess, the outcome between now and the time the fault is found. Hard fact is:- the car is currently unroadworthy, and it has to be fixed, and someone has to eventually pay.
Priority will be to get the car booked in without delay ( good luck with that!). It could be as simple as a blocked filter in the pump/s so worth looking on the bright side.
Meanwhile, carry a supply of multi surface cleaner bottles filled with washer fluid to be able to stay as safe as possible in these conditions.
Warranties?? always a topic for discussion, but the devil is in the detail, and the detail has to be read, but seldom is!
If you work on the assumption ( now it’s catching!) that warranty companies are very experienced in getting under a snake’s belly with a top hat on, to avoid paying, then you will not be too surprised at the outcome.
Perhaps you could keep us up to date Amelia.
Kind regards,
Gareth.