Hero Motocorp — bike not properly riding & bubbling running time

Address:

121101

I was purchase a splender bike in september 2017 to sehgal hero agency, faridabad. But my bike not run accurate in a line and countinously bubling my bike. It is very dangerous for rider. I inform to service incharge after that my bike tire change cut mazor problem not solved, i request to you please my bike problem. What i do in this situation. Please suggest.