Your All Stars and/or Dynamos sessions should follow the schedule that was advertised when you booked on to the programme, unless you hear otherwise from the club.
To see this, log into your account at https://ecb.clubspark.uk/ and click 'Your Account' > 'Your Bookings'
In the case of a session being postponed/cancelled due to inclement weather, the onus is on the club to let parents know; usually via an email (look out for firstname.lastname@example.org).
Club specific queries such as these, should be directed toward the main club/centre contact; if you are unable to find this then feel free to contact:
All Stars - email@example.com.
Dynamos - firstname.lastname@example.org.