kitchen faucet is stuck and we need help
In my part of the world, typical tap clamps look like this



or this



Sometimes, things are obscured by a tap brace that you must remove.



The retaining nuts are not always easy to see in the darkness under a kitchen sink full of pipes and other obstructions.

But if you are removing the sink and tap and disposing of both, it doesn't matter. 

You can undo the other end of the tap tailpipes and throw out the whole lot. In the worst case you can cut through the pipes (above the isolating valves obviously) with a suitable saw and tidy up later.