Unfortunately an original battery that is 2 years old is very likely to fail.
Some batteries need to be replaced under Warranty.
There are a few on this Forum who's battery has lasted 5 years, but they are in the minority.
what battery to buy in Canada and where, I think he is near Ottawa.
What you are looking for is a thin plate Group 94R AGM battery.
Generally I like to let my Jeep dealer install my new battery so if there are any issues they can deal with it.
When they get it all done see if YOU can twist the cable clamp on the battery post.
If you can twist the clamp they didn't do the job right.
Somehow I don't have a lot of confidence in your Jeep dealer. Ask Mark if there is a shop he recommends.
Just visited Ottawa on GoogleMaps. Check this store: Total Battery, 1151 Newmarket St, Ottawa, ON K1B 4N4, Canada
Also, NAPA stores sell batteries, See if your CCA membership will get you a discount.
It has been a really long time since I visited Canada so don't necessarily believe anything I say about Canada.
Probably you bought the Jeep off the lot, no telling how long it was sitting around and not getting the battery charged.
Maybe it is finally catching up with you.
If you live somewhere, where you can use a battery charger, it might be a good investment.
It will be expensive, but get one that will charge an AGM battery. NAPA has real good ones, about $300 US.
There might be something tricky about charging a battery that has IBS, I don't know the answer.
My X2Power AGM battery needs to be charged about every 5 days.
Turn your ignition to RUN and don't start the engine, find the EVIC screen that displays battery voltage, it should be at least 12 volts.
If you think the battery discharges too quickly look for things that are still drawing power; dash cam, glove box light, cell phone, trunk light, something plugged into the trunk cigarette outlet, etc.
Tell us more about your Cherokee.