Bought this by accident on PPV was great but ending spoiled it!

Just mistook this for the 2015 film and decided to watch it even though i'm not into these type of films, the film kept me interested right until the end which is a major thing for me I'm a major film-sleeper:) Anyway the film was great and gripping until about the ...
...part when the mexican gangsters return I kinda wish i would have fallen asleep as the ending just kinda spolied the whole movie for me