Any problems we had like that we raised with Sylvia, who dealt with the snagging lists. Even if you have submitted a snagging list you should still be able to raise the issue (we did!). Pepe came and sorted out most of our problems e.g removing the stabilisers from the washing machine etc. Sometimes you have to keep on at them before you get anywhere! Sylvia used to be based in the apartment to the side of the main entrance to Block 12. Possibly still there but I haven't been back to the apartments since September.
Remember you have bought a high specification apartment, or so they told us when they took our money! (Not very high spec. though considering the dishwasher is one of the cheapest you can purchase in England). Having said that our dishwasher works ok.