S.chand Publishing — S Chand Class 9 all 3 science books

Hi Schand, I am here to issue a complain regarding the scratch and win program. I had bought 3 class 9 s-chand books and there it was written to scratch and enter the code. When I scratched and entered the code but it was saying it's invalid. I tried all 3 scratch codes but none of them work. I am very disappointed with this. I hope that you will solve my problem. That's all I wanna say and if it's resolved plz contact through my gmail account [protected]@gmail.com