Parking lot hell

I have a house behind the eastlink Center and there are two parking lots that surround residential, every single night with the parties that go on and when I get home from work at 3:00 they all start piling in, they drink and smoke dope even when there are children playing in the football field,they are doing smoke shows that last hours! I called bylaw and RCMP and nobody comes! It’s every single day! About 20 of them, I don’t know what to do, the whole neighborhood is frustrated