For anything the booking calendar cannot answer.
Email is the fastest route — replies usually come the same working day, South African time. If your question is about a lesson you have already booked, please include the booking reference from your confirmation email.
Email: hello@example.com
Teaching hours: Monday to Friday, 09:00–12:00 and 17:00–20:00 (Africa/Johannesburg).
If you would rather just get started, the calendar is here: see open times.