Tata Nexon EV Max give only 200 KM for full charge

I am using Tata Nexon EV Max from last one month but it gives maximum range of only 200 KMs for full charge though Dashboard says 300 KM Range for 100 percent charge and 453 KMs range claiming by Tata Motors which totally fake just to attract customers and to get trapped. Please take wise decisions before buying this vehicle as currently there are not much charging stations out of bangalore city limits.