Major issue with GPS navigation

The issue with GPS navigation when connected to CarPlay. Route keeps fluctuating, the pointer moves in opposite direction. Cannot follow the navigation on the infotainment screen. Issue raised with team for 3+ months and still not resolved. Company doesn't even provide replacement vehicle to customer. Pathetic after sales service. Maruti cannot make a luxury segment vehicle, hence proved. On top of it, started getting sales call from hotels, hospitality companies asking if i would be interested in buying package since i have purchased a new car with all my details such as name, number, address.