Consumer Redressal

Respected sir,i had purchased one oxygen generator for my autistic child from SANRAI,#211,shree complex,st john\'s road,Bangalore -42,on 22/9/14 by issuing one cheque of 43000rs dt-25/9/14.While purchase company manager Mr.srinivasa assured me that it can be return back after use but it depend on number of hrs.After using one hr within two day i realized that my autistic child is sleeping very late.So i called the manager and told to take back and for one hr use i am ready to pay amount but he is not taking and forcing me to pay full amount.What he promised to me same thing he promised to my friend N b singh (8861309480)dt-25/09/14.pl help me.