Paytm — Wrong material delivered and not able to customer care

Address:

Bangalore, Karnataka

my ORDER NO. [protected] . i ordered sandisk memory card 16 gb with 48MB/s .they delivered 30MB/s. i requested but no response getting . i sent so many mails and tried reaching customer care . finally got a chance to speak with customer while i am expalining my concern he dropped my call. after long struggle they accepted to give back money, still not yet done. if i get cash back money into my paytm wallet, i cant utilize money, because they holds money . thats i am asking direct cash or deliver right material whenever taking back the material. they denying to do that .