Such a shame things aren't getting easier for you Ela.
Ruth, part of the problem is people want kittens, they dont want the adults, we have had people say no to 4 month old kittens, cos they aren't kittens in their eyes - one person who wanted my kittens ended up getting farm kittens instead, as they were closer to her, and despite the fact that our adoption fee means you would pay a lot more by getting a free kitten, so it wasn't they didn't want to rescue, but it was more convenient. And sadly yes, a lot of kittens free to good homes will then go on to create more kittens free to good homes.