Xyz — I am buy a new Nokia 105 mobile problem

I am buying a new Nokia 105 mobile phone in 21/10/2021. When I am purchase that day poorvika sales person told if phone having issue we will guarantee phone will be replaced. I am doing full charger itself that charger is not fully charged. I am facing heating issue and automatic phone restart. In 25/10/2021 I am going ask poorvika store manager they are speak wrongly and rude . I am not satisfied for customer support.
Poorvika sayee nagar branch