For parenting courses see Bristol or Gloucester depending on which is closer.
South Gloucestershire Talking Therapies: free support for people aged 16 and over
https://iapt-sglos.awp.nhs.uk/ or phone on 0117 378 4270. Give them a call, or self-refer via the website by completing a registration form or by booking directly on to one of the courses.
TIC (Teens in Crisis) provides face-to-face and online counselling services across Gloucestershire for young people aged 9-21 and their families. They also have some top tips including tips for staying safe online, how to talk to your doctor about mental health and more.
https://www.ticplus.org.uk/. Phone 01594 372777
Bourne Family Project in Kingswood offer some counselling and play therapy for children from the age of 3 years (contribution required) http://www.bournefamilyproject.org/index.html