Karma isn't real

I went to Polish w******* central station (train) and some random asked me to help with money for a ticket I have him 25$ and before when I was walking there I gave some homeless some coins. Ppl would expect "wow what a nice person he will get good karma soon" but you know what? F*** karma, I waited on exact right time for departure and completely different train come and I had to wait half day for next one. Imagine getting bad karma for helping ppl, I will never ever help anyone even if he covered in blood and need asap first help or resuscitation. This is ridiculous