Jio Mart — Refund not credited for non delivered item along with 10%cashback not processed

I have been ordered in jio mart on 06-dec-2020. Order number is[protected]A.

I have ordered some groceries on that 1 item not delivered but it has been charged.I have sent several complaints to customer support over calls /mails .
They haven't responding well .when i made a complaint they speaks politely & giving an assurance that it will credited within 48hrs .
Only the times are gone but nothing is happened.

Also 10% cashback they have announced at a time of order placement .since it also not credited .

They only shows the fake promotions.

Please do issue get resolved.