If you don't want to go through the warranty exchange, open it up and resolder the switch. If that doesn't fix it, replace the switch.
The same thing happened to my backspace, I just desoldered and resoldered in a small wire and it now works fine.
If there's guarantee on that board I'd give it back to the vendor and let them fix it. If not open it up and show us the solder joints of that key.
Hey guys thank you so much for the responses.
Ok so for the guarantee, I bought it from Amazon and when I go to the return tab it says that I can't do so anymore. So I'm guessing it has not guarantee anymore?
And I'm also not a savvy when it comes to fixing hardcore nor I know how to resolder switches. But I'm willing to take any pictures and go through any process if it is affordable. I really really love this keyboard I'm using a rubber keyboard right now I just hate it

Again, thank you for tanking the time to help me out. It means a lot, this happened 3 days ago and I was just very upset.