4 year old son diagnosed with ASD

Hi I've just joined this group today. My son was diagnosed in June and has just started in reception. Not sure where to go next I've been trying to get onto the parent classes that were suggested in the assessment however I've phoned bexley snap twice with really lovely helpful staff saying they will send info to my email each time so I can fill in the form for the course but received nothing both times I've checked spam emails. Does anyone know how else I can get on the courses? Or who I can contact. 

Thanks