I had something similar happen to me when my missus was expecting our first nipper. We had just bought an apartment on Eccles New Road, Salford lads will know them as Langworthy flats. Anyway, the wife was having a bad time with pregnancy and I was working shifts up the road at Colgate and every day or night coming home to the 2 pricks upstairs playing music at top volume. I was brought up in Hulme and my first instinct was to go upstairs and launch the fuckers but the missus was gettin all upset about that, so I tried to reason with this pondlife. Needless to say 2 weeks later I was kicking their front door in and throwing the stereo off the balcony and got the mouthiest of the 2 by the waist of his pants and tried to get him over as well. This was followed by 2 weeks of my mates sat outside the entrance to their stairwell in a Transit, opening the side door when they came out. By the 3rd week the For Sale sign was up and within 2 months they had fucked off. I think the advice of Aphex and others on here is admirable but sometimes reasoning just doesnt work, good luck mate!!