Byju's — Reschedule for Optional Class Timings

I wanted to change class timings for my kid optional class from Sunday Morning 8:30 AM to Tuesday Evening 9:15 PM. I called around 23Jan for this request and Ashiwarya my kids mentor said this will be done, next week post 26th Jan I called up again, I was not able to connect to Aishwarya but some other person attended and said that this will be done, and post this later my wife received 2 calls stating that this will be done, and based on this confirmation i booked my kid for Sunday morning tennis classes. However the change did not reflect on the app, and I followed up again and again got a confirmation through mail that this is done and will reflect on tab soon. However till today this is not done and kid is loosing classes. Mentora Aishwarya/ Jibin/Pavithra are absconding, despite several calls and mails there is no response. Every time I call to the center they give false info that the call is being arranged in 15 minutes, but its been more than 15 days and no resolution in site. The mentors have mails saying they are no longer mentor for my kid. The company has been highly unprofessional in handling a basic case.