I realise their garden is no business of ours and they can do as they please, however it is starting to affect ours.
We have 6 foot fences that we paid for, despite it being their side. The last one was falling over and they wouldn't do anything. Since then their garden has been completely neglected and is now overgrown. The shrubs and trees are starting to make the fence lean, they're way above the 6 foot fences and shading our garden. The garden is full of brambles and is way beyond what an average gardener could put right. By next summer I expect the brambles to be level with the top of the fence.
Is there anything we can do to protect our fence and garden? We've asked several times and they say they'll sort it but don't. We frequently cut back and throw things over but we're losing the battle.