I've come to the conclusion that paying 3 grand for a watch and then being invited to pay £400 for the pleasure of a battery change and a service is just ridiculous.
At the end of the day, it's a quartz watch with a ton of marketing behind it. I've got cheap quartz watches that have lasted 40 years just fine without a 'service' - a Breitling has better manage that.
Paid for the 'service' the first time. Sure, it came back in a leather Breitling case, but who cares!
I've just changed mine myself the last two times. Mini screwdriver, steady hand and 10 mins. Cost £3.
Look on eBay for a Renata 380. Same Swiss battery that Breitling use.
It may not be tested waterproof, but I didn't wear my Breitling in water anyway.