byjus tablet - Byjus package is not working as promised

We were contacted by Deevesh, Byjust sales guy, we my son was using Byjus app. He took appointment with us and visited our home.
He explained advantages of taking Byjus package; out of which * were student will be regularly contacted by friend like mentor and will be clarified on doubts related to what was taught in school and Byjus will provide customized syllabus in the table as they have tie-up with the school when we mentioned my son's school follows their own curriculum. Also we were told that we can try the product for ** days and then return if we do not find much use of it.
When mentor, Arpitha, called us for the first time, I set these expectations. But she denied to this telling till *th standard, they give common syllabus and only once a week there will be call from the mentor. I clarified her this was not told us when we bought the package and she promised to check with Deevesh and come back to us which never happened. At the end of * weeks, we decided to return the package and called Byjus. Sameer came into picture as Arpitha was absent and he promised that they will map the syllabus according to school syllabus and send it in excel whenever there is a mis-match and also told student would be contacted as promised by Deevesh. He convinced us this way and we did not cancel. We also contacted Deevesh and he mentioned that he has also internally escalated and mentor would be changed for my son as she is not senior enough to handle the student.
But syllabus was never mapped and also no proactive calls from them for * weeks in a row. We tried escalating through Byjus link, but no response received after * days.