How do I connect my kitchen sink sprayer
What it looks like is you shove the hose in, then pull the plastic clip outwards to lock it in. If water sprays out of it, you need new o-rings. If the hose shoots out, either that's not the clip, or some of the plastic is chipped making an unreliable lock.

If this isn't the case, could you tell us what you've done to try and fix it already and what moving parts you see? Perhaps a photo of the top of the faucet may help too