Byjus — Not received the product and noone is responding

I have paid byjus subscription for this year along with tablet on 01.06.2021.but till now i didn't receive any message or email confirmation from byju regrading my order and their is no tracking details about when i will receive it, if call byjus the call goes to the mentor, he never response, the customer call number says you will get a call back after 15 minutes but no one turns, when i personally called the mentor and inquired about my status he says they are making ready of the SD card and he never committed for the delivery.If i ask him let me know the date when i will exactly receive my order, he says that i am argont, what a service you provide hats off.
So i very much disappointed with your service please kindly cancel my order and refund my amount at the earliest iam sharing you the payment details for your reference.if there is no response to this mail also, i have just planned a log a complaint, Hope you will solve the issues.
This is for your kind information when you were asking for payment you wanted me to make within 5 minutes. When it comes for service you say the customer is argont, what a service.