Wait upto 30 days.
One person didn’t get the rewards for 1st feb, complained last weekend, and yesterday he received the rewards + welcome rewards.
Some people told - if your card or account is new, your new account/card is not linked with IDFC rewards system that's why too much delay.
You can complaint after 30 days or wait 2-3 months all rewards will credit automatic, once your account or card become old, you will automatically getting all reward points