Byju's — The learning Tab is not working properly & we can't communicate with mentors as our mobile number is blocked by Byjus

The learning Tab is not working properly & we can't communicate with mentors as our mobile number is blocked by Byjus. Every day different person is calling to us introducing themselves as byjus manager & every time we are telling our problems that " we are unable to contact mentors our mobile numbers are blocked & our tab is not working properly. Also no mentors are communicating with us. No body is assessing my daughter from byjus side" but end of the day we find no result. We need to resolve this issue as early as possible. I mailed lot of times to byjus support team but no positive result found.