Few months of not receiving calls !!! Or making calls !! After dialling it goes quiet and no ring tone .. error message “CALL FAILED” also mobile network data issues ( smarty say there is NOTHING they can do , due to congestion on there cell towers from ( 3Network )

Few months of not receiving calls !!! Or making calls !! After dialling it goes quiet and no ring tone .. error message “CALL FAILED” also mobile network data issues ( smarty say there is NOTHING they can do , due to congestion on there cell towers from 3 NETWORK ( which is kinna a lie as there are millions of cell towers out there to connect to I’m pretty sure ! When doing speed check it shows a lot of cell towers nearby! )