looking for uk labouring work

I seem to have an issue getting work, I have a cscs card and work at a local grocery store, I'm on my feet all day and work with many people.

Im simply looking for labouring work, however, even the lowest-paid jobs require multiple years of experience.

How is it that difficult to get work in the construction industry? I have paid for a cv template service also. Yet I get nothing?

if anybody can explain what I'm missing that would be great, thanks