he is not given a cash memo bill

Location/place: g m ansari 60 a c b i colony basant vihar new deLhi 110057 mob 9990517868

Name of company/service: GUPTA JI LIGHT HOUSE

dear sir i bought a kitchen pride l p gas stove R Z 101B/7MADHY MARG MARKET TUGHLAKABAD EXTN NEW DELHI CONTACT NO 9015566933 in rs 900.00 but he did rudely behave and he did not provide me cashmemo bill and he said i never give bill at that time i am in hurry so i could not do any thing and paid 900 rupees and come back to our home dear sir please suggest me what sholud i do

thanks & regards
g m ansari
60 a c b i colony basant vihar new dlehi 110057
mob 9990517868