I'm not surprised you couldn't get service on a Saturday of a holiday weekend. Furthermore, I know of very few companies that do Sunday warranty service on any brand of home appliance, except for safety related repairs.
As for sending it back, unless the dealer has a money back policy, I
wouldn't hold my breath. Most warranties usually state that the
manufacturer will repair or replace any 'PART of the appliance that
fails to function due to defects in material or workmanship' for the
extent of the warranty. They don't usually say the whole appliance will
be replaced at the discretion of the owner.
In regard to 'purchase one from a dealer who will look after me', most
dealers have families that they'd like to spend time with on the
holidays too. If there are any stores that are open holiday weekends,
they're just trying to sell appliances. I'm sure they wouldn't have any of
their service technicians sitting around the store waiting for
something to happen.
I'm sorry you got stuck but let's be realistic. For many factory service
companies, getting service within two weeks is considered fast. And
if yours is coming on Monday, that's pretty darn good.
I hope the rest of your holidays are better. Take the wife and kids out
to dinner and show them you're not going to let this ruin their holidays
too.