Nokia India — defective nokia cell phone sale

Address:

122001

I have purchased nokia 6.1 plus from spice communication gurgaon sec 31.
After three days there is a problem within listen to the sender's voice. When going to the service centre, they told there is problem software. They update the software and told the problem was solved, but after 10 min problem remain the same. Again we went to the shopkeeper and asked to change this phone with a new one, but he refuses to do that.
I m totally unsatisfied service provides by nokia