otterised

We juz bought a Samsung lcd from Suntec fair, Audio House, and when the guys delivered, they told us our walls are a bit thin though should be no problem, but when they drilled the 6 holes, one of it went thru entirely and now there's a hole in the bedroom wall. They juz told my hubby to buy some cement to patch and went away liao~ wahrao!! What kinda service is this?? We decided not to pursue the matter after reading all these entries cos seriously, I don't think anything will come out of it anyway~