Google India / Tez — google pay 2020 cake complete scratch card

My mobile number is [protected]. There is a new year welcome offer from google pay. Google pay 2020. They are offering to complete 2020 cake whicht has a 3 layer.1st layer consists of 3 stamp, 2nd layer consists of 2 stamp and the last layer has 1 stamp, each layer has seperate sccratch card and after completing all layers there is a cake completing reward scratch card.. I got seperately every scratch card for completing 3 layers. But after completing the 2020 cake i did not get the cake completing scratch card. I only got happy new year greetings scratch card. I claimed cake completing reward but not recieve the final scratch card.
They must give the last scratch card asap!