Battery life is horrendous, 3 weeks…

I have a VD3+ and have set the settings to recommend for best battery life. However I only get 3-4 weeks and battery needs changing. I’ve started to note when I’m changing batteries (I have 2) and it’s around 3-4 weeks. Nothing like the bloated 6 months that Ring say. Now I know Ring would say 6 months as ideal situations etc etc, but to not even get 1/2 of that consistently I don’t think is correct. I’m in UK and only support is via telephone for some reason. I tried once and they checked settings and said looked ok. The only recommendation was to get a wedge pointing away from my door!?! Isn’t that the point to detect people coming? I’ve programmed the zones to trim in and just detect what I want but still get 3-4 weeks. Is this normal? Anyone suggest anything, is my VD3+ faulty? Thanks