@EmGee
I have a similar issue. Not the same but similar.
I took early retirement after 35 years of working (25 years in a busy, professional career,) and moved house a year or so after, to a small, rural area, in a smallish village (with 350 people.)
Within a few months of getting to know people, and joining a couple of hobby groups, and going to Church several times, I was constantly being badgered to do things, give people lifts, get involved in 'voluntary work,' get onto the cleaning rota for the parish hall and the Church, host coffee mornings, look after peoples kids etc etc, and it really got on my nerves.
I had spent my whole adult life up to my early 50's, (so 30-35 years,) raising my kids, looking after elderly and ailing parents and in-laws, and looking after my family and home; all whilst working/building a career. And by 52/53, I was finally at a point where I had no kids at home, my parents and in-laws had passed, and I was able to give up work.
I decided after being everything to everyone for so many years, I was going to just be selfish, and do stuff for me, and enjoy my freedom, and 'responsibility-free' life.
Apparently though, because I didn't work, and had no kids at home, it was assumed by some, that I had fuck-all else to do, and was just sitting at home waiting to do favours for people, and give lifts, and look after peoples kids!
It got so bad, that after about a year, I told people I had got a job. Luckily I live in a little house on the edge of the village, 10 minutes walk from the nearest neighbour, (at the far back of the village,) so nobody has to come past me, so they can't see if I am in. (And I keep the car in the garage so they don't know if I am in!)
So could you do that maybe? Tell them you have a job now? Working from home mostly, and you are FAR too busy to help, and have 'work commitments.'