Reliance Jio Infocomm — slow internet speed and network

I chose jio for their fastest speed and good network ( they claim) but the network of jio is very bad and internet speed is very slow.. i had recharge with 399 for 4g data and calling but i m unable toh use data due to slow speed. I complained for network issues and internet speed but i did not got solution by customer care service.they repiled that where i live has low network coverage thats why they are unable to solve my problem..