If one of your neighbouring tenants is violating your right to quiet enjoyment, it is not your responsibility to approach that neighbour and resolve the problem. It is a landlord’s responsibility to make sure that all tenants are respecting each other’s quiet enjoyment. The best way to address the problem is to stay calm, and start keeping a written record of the date, time and nature of the disruptions. If possible, try to have someone witness these disruptions too.
You should also contact your landlord in writing. See TRAC’s template letter, Loss of Quiet Enjoyment. Once you have informed your landlord, they have a legal obligation to protect your right to quiet enjoyment. If your landlord does not respond to your complaint in a helpful way, you can apply for dispute resolution through the Residential Tenancy Branch. Keep in mind that this dispute would be against your landlord for failing to resolve your complaint, not your neighbour. Through dispute resolution, you can ask for monetary compensation and an order that your quiet enjoyment no longer be violated. In cases where the breach was very serious, and caused intangible damage (i.e. damage that does not have a dollar value), such as emotional suffering, humiliation, or health problems, you can request to be awarded aggravated damages.