I wish I could tell you how. I have lived next door to worse for 25 years. All I can say is do not rise to the bait, no matter how dreadful they are, because then they have won.
My next door neighbours spent a quarter of a century, all their retirement making life as miserable for my late husband as they hoped they could. I am disabled since 1987, George was a retired vicar, and we really do not know what of those triggered such hatred, or was it that George refused to move, saying no one was going to chase him out of the home he saved all his life to buy. We lived in this house for 10 years before they moved in next door, and anything they could do, they did, from the first week.
Try to turn the other cheek. We did, and they still carried on. He died last year: what a waste of his life. We knew nothing about them, not even now, and until last year I did not even know the name of his son.
You are on a better path if you can ignore the pain they cause, because they look for victims, and if you show hurt, they have found one. Be sure they will not stop what they are doing. It is better not to be drawn into any conversation with them. It does no good, and if you did speak to them, about anything, you can be sure your words will be changed beyond recognition, so try not to have any contact with them. Better to buy headphones than try to reason with them. If you wear them in the garden, they will either see they bother you, or they will stop making asses of themselves. Try to resist them, if you do not, the husband might make suggestions to you, and bear in mind that it just looks like one neighbour chatting to another.
I bought an alarm. I turned it on when he came, because a week before he had crept up behind me and pushed his paunch into my back, and being disabled, I cannot steady myself. When I pulled the alarm it sounded just like a car alarm and he stood there laughing, and I realised that no one would come to help me, because it would be like one neighbour having a chat. Who would believe otherwise? They can blame you for making the first moves. My disability meant they could not do that to me.