Report the problem to Riksbyggen on telephone number 0771 860 860 or via their website: https://www.riksbyggen.se/kundtjanst/
For help with disturbances inside and outside the property, call the nuisance response team at 031-394 90 07.
Have you been hit by a water leak? Call the bug report and emphasize that it is urgent. Did you know that you can turn off the water yourself with a allen wrench? Valves are available both in the kitchen and in the bathroom, see pictures here.
In case of emergency call 112.