Paytm Mobile Solutions — cashback not received when eligible

There was an offer which on paytm mobile app which says "rs 1000" cashback for making 5 transaction of minimum value of rs150. The offer is eligible till march 31, 2020.
Only 1 transaction in a day will be counted.

I have completed 5 transactions following all the t&c's for this offer, but in the end i haven't received the expected cashback.

The offer said - cashback of rs 300 after completing 1st three transaction.

But after completing the third one, i did not received 300, instead got rs 5 only.

Next the offer said, make another 2 transaction, and get rs400 cashback.

After completing the fifth transaction today i. E. On 14th march 2020, i have got only rs 5, not rs 400 as per the offer said or rs 1000 as per the initial offer said.

Attaching the screenshot of the same.