Wired Fire Alarm Faulty- Landlord Unresponsive
My rented 3bed house has 7 fire alarms installed (wired). One is faulty and kept going off unexpectedly and wouldn't stop so landlord advised over a week ago to turn the fire alarm switch off at the mains (and remove the battery from the faulty one) and the other fire alarms will still operate due to them having backup batteries inside. This was supposed to be a max two day temporary fix until they came around to look. Well now one by one the fire alarm batteries are dying and I'm stuck with loud beeping. The battery I did take out in the faulty alarm was difficult to wiggle out and i was unable to put a new one back in from fear of breaking this plastic part that's job looks to be to secure the battery lid in place. I couldn't find a way to take it apart without it seeming like I'd break something.
Anyway my main question is what do I do? With the batteries dying due to the landlord not turning up is it still my responsibility to replace them? Even though I can't even get the alarm apart to be able to put a battery in myself anyway? Do I just contact the non-emergency fire services to help fix this at this point?