You need to contact the service provider directly to change in the type of service booked by you earlier. You will find contact details in the SMS notification received by you.
Change in type of service booked is subjected to the availability and Service Provider may ask for additional charges.
As of now, Wellnessta do not provide a change in the type of service option. However, Wellnessta Support will be happy to assist in finding if rescheduling is possible or not? Please call our call centre or message on WhatsApp.