TalkCharge — I didn't received the cashback according to the offer

Address:	Mumbai City, Maharashtra, 401101
Website:	talkcharge.com

I didn't got the cashback for the 1st use
according to their offer i should get
rs.20 cashback
which i have not receive
please help me with it am feeling so helpless

it was my 1st recharge with this website i was not knowing it was such a from company
after all
i trusted to it
and i am getting now less confident on online think
because of all this website