Having issues with patio.  Have had patio put down, lifted and redone x2.  Last builder left last step too high and I had to have a third chap in to add another step.  Initially the wall cracked with cracking to grout on upper patio and steps wall.  Now after second fitting we have some cracking to grout on wall at top of steps and top patio.  They have covered the drainage holes on the bottom walls.  There is a brick wall under the bottom walls with drainage holes beneath slabs. We really don’t