SBI isn't giving simplysave not because of you, because it's SBI. SBI do same things to everyone. Proceed offline through branch, hold a good sum in savings in your name, otherwise apply the card in your parent name. They initially decline, email to customer support explain you hold good sum for 3 yrs, you are a valuable customer etc etc. if not move up higher, email to grievance redressal explain the same. If not move to PnO. Most of the time PnO solve this issue unless you have a big problem in CIBIL or spendings. Your chance is higher for cashback with good limit of you doesn't hold any SBI cards.
Next time apply at the airport, they don't do physical verification if you already hold a savings account with SBI. They check your cibil, do a vkyc and issue your card.