I bought a detached coach house. Two out of the three garages underneath belong to other people. The two garages other than mine garages have no light or elec and up until recently have been used for storage/parking. However recently the new owner of the flat in a block who has one of the garages below me has set up a gym for himself and family to use. It is sending noise up into my accommodation that runs above, and feels intrusive. I no longer feel I have privacy because they must be able to hear me if I can hear them. The garages are not built with sound insulation like that in between flats in a block. I cannot open my window above this garage because of noise/my privacy/and possibly the use of garage as a gym is a covid risk. What do you think please?