Paytm Mobile Solutions — cash back not provided on order no [protected]

Address:	New Delhi, Delhi, 110064
Website:	www.paytm.com

I would like to bring a case of cheating wherein paytm has not provided me with the assured cash back against my order. As per promo offer, i applied for "must buy" promo on my order no [protected] dated november 1st 2017 for rs.3302/- and code applied successfully for the amount rs.862 as per given details hereunder which paytm has refused to provide now. It's a clear case of cheating by paytm and i need the money back from them on immediate basis along with interest.
Item name price cash back applied as per promo code "must buy"
Arial matic top load 449 157
Vlcc oney moisturiser 250 63
White 1 pc smart sensor light198 198 na
Livon serum 230 81
Fogg bold spray 500 125
Vlcc insta glow bleach 430 108
Garnier color natural cream hair colour 190 57
Himalaya tan removal 259 52
Head and shoulder shampoo 285 100
Blackcurrant and bearberry sower gel 199 60
Veet hair removal 167 8
Harpic toilet cleaner 145 51
Total 3302 862