Civil claim for loss of income due to neighbour noise

Dear Flat-chat

I am currently leasing my apartment out because I have a job interstate for a couple of years. I lease my apartment through a real-estate agency and have a very good tenant. However, because of unresolved noise issues with the tenant in the apartment above she doesn’t want to re-new her lease. Before I moved interstate I was living in the apartment and had a lot of trouble with noise from this tenant and to be honest I was pleased to move out. I have a long history of noise problems with the owner of this apartment and a couple of years ago when I was living there I went through the whole process of making complaints to the landlord, the strata executive and the managing agent. I  kept records of noise disturbances, obtained witness statements and finally went to mediation (at my expense). Eventually they got rid of the offending tenant and for twelve months with a reasonable tenant everything was ok but now they have a shocker again. Before I moved out I had a mediation session with the real estate agent managing the property and the tenant but the tenant didn’t improve. I’m sick of banging my head against a brick wall and was thinking of getting my solicitor to threaten legal action for loss of income/damages. What do you think?