I knew we had some issues with drainage, but we were trying to hold off until we could afford a pool/professional landscaping. Today, determined to find out the water issues, I found water welling up from BENEATH my paved area. I pulled up the section and dug down to a broken pipe, but with no apparent distal run-off implying a blockage, as well as the broken section. The pipe disappears beneath a 3 metre slab, then I'm guessing runs underneath our grass toward a visible storm water manhole cover. I can't see any way other than to dig up the slab, or at least the grass first to try and find the blockage. There is a very large, but very old mango tree not too far away, but I think the piping work is 6-12 months old (but a bit DIY by the hands-on previous owner) Failing a successful DIY, any recommendations on someone who can reasonably but competently fix this for me?