Flipkart — moto e3 power mobile not working properly

Address:

Chittoor, Andhra Pradesh, 517501

I bought a motoe 3 power mobile on[protected] through flipkart. 2 months before the power the service centre told mother board is not working and changed it. After servicing the mobile not charged. Again we took to service centre they repaired but the mobile displaying lines and the camera also not working. How can we replace this mobile