Vijay Sales — defective product and misguided by hdfc bank staff

Address:

401105

I bought sony htiv300 home theater on sunday 9th dec 2018form vijay sales miraroad branch, 1st problem is 1 speaker is defective, and 2nd problem at time of payment here hdfc bank staff confirm there is offer from hdfc bank 5% cashback & 0% rate if emi for 6 month, and today morning i get message from hdfc bank my emi converted for 6 month @ 13%.
I contunisly calling to [protected] vijay sales manager at miraroad branch, but he never answer on call.
This is requesting to vijay sales please resolved this problem as soon as possible.