Bajaj Finserv — Synthesizer/ emi charges and cpp

I purchased a synthesizer from Amazon 3/5/21, it was clearly written that it was in no cost emi and I can purchase through bajaj emi card..but after I purchased I a got call from bajaj and said about CPP..I didn't understand and I'm sure they said it is the annual charge for the card and it's one time only..not only that my loan amount was 2298 per month..the said rs 189 will be added for the card..but I have got a massage that I need to pay 2702.why this kind of thing will happen..410ECFGY931072 this the product Lan no...410ETBGZ218575 this is lan no of CPP
Now I need to cancel the cpp and want to know why the emi amount is 2702
Immediately..