What to do about disrespectful 22yr son
My son is 22 he lives with his girlfriend and daughter over the years we have had what you would call usual family problems , his mum left us when he was 7 and he had learning difficulties while at school , when |I re married he had a few problems with my new wife so much so in the end he went to live with his grandparents, My 2nd wife and I divorced a year later , I have 4 children and 2 step children and they have all had similar upbringing but he is the only one who now continues to to be disrespectful he calls me his father a pr**k waste of space lonely old man all over social websites and via txt, this because I don't get to see him and my grandaughter whan he wants me too I do go when I can and when I do its always awkward as its seems his girlfriend is always in a rush to get out so they ask me for a lift , I have given them my time laying carpets putting up aerials and lending them money which I never get back , but he still insists on the constant abuse towards me and my wife and now his sister , what can I do