TVS Motor Company — tvs ntorq 125 problems

Address:

Bargarh, Odisha, 768028

Hello, i'm ronak from odisha & i own a tvs ntorq. I bought it in may 2018 from shubhamm tvs, bargarh, odisha and it started to give problems after 4 months (After 2nd sevicing). My problem is that the spark plug is getting sort and the bike doesn't start until the mechanics of showroom came & changed the spark plug. The same problem happened for another 2 times, a total of 3 time in the first 6 months of purchase. The problem solved in all the 3 incidents after changing the spark plug. But i didn't got any permanent solution. I even dropped the scooter at the showroom work shop for 2 days after they suggested me to drop it there, but i faced the same problem again.
So, please help me to find a permanent solution.
Thank you.