Byju's — Refund issue

I have ordered my kit of byju's they told me that this will be refunded if you don't like it my order delivered my home in 5 January and I and I told byju's that I don't want this at 16 jan.but they send the address of byju's at 31 st january I am posting the kit but now they telling to pay the emi because of financial issue I can't pay
it. they are telling to pay the EMI else they will complain it to police. Please take any action regarding this and help many o[censored]s.