I respectfully disagree, car batteries are pretty universal, as long as one takes note of the polarity i don't see how you can use "the wrong battery", the main differences are battery capacity "ah" and cold cranking amps "cca".
ah means absolutely nothing in this scenario, and not much in most scenario's. cca would potentially mean more but generally today's smaller batteries put out enough amps to start even bigger cars.
I have a power bank jump starter thats limited by its cable thickness to about 100amps and that easily starts my Ford Fiesta. Even my bike battery has a 175cca.
That's why i would recommend get another battery and drive it to an auto electrician.