Hello. Looking for advice. We have had a large concrete pool put in our garden in Spain via a professional pool company. Upon filling the pool the water will not reach the top step without almost entirely covering the skimmer. Although water is still circulating no debris is being sucked in. The pool company are telling me it's fine to cover the top step and skimmer will still work. I do not believe this and with water under top step skimmer is already 3/4's covered. Firstly is it normal for top step to have no water reaching it and do the skimmers appear in the correct location. Pool company are adamant it's been done correctly but common sense is telling me otherwise.....