Bad customer service

I don't think I'll ever fly mango ever again after the bad customer service I recieved today. I actually wanted to cancel my return flight and I was told there is no refund.

So im suppose to board at 15:15 at Lanseria, flight no. JE591, I head to the Mango information desk to ask the lady where I should go as I'm boarding and it's the first time I've used Lanseria. It's 15:18 or less but she says to me 'you've missed your flight" I asked how come cause I'm only boarding now and I've checked in online, then the next excuse was my luggage which I was able to carry by the way...

The next thing I heard our names being called and I pleaded she let me go and the people from the terminals would advice according but she didn't care all that mattered for her was us securing the next day's flight with an additional payment, no courtesy or sympathy none at all.

IF any thing happens to my son whose in PE waiting for me to take him to the hospital as I have our medical aid details I'm coming for that lady who didn't even have a tag or rather give me her name.

But I still state I WILL NEVER USE MANGO EVER AGAIN. I heard people complain but now that I too have experienced such I'm HURT AND DISAPPOINTED!!!!!