KTM Sportmotorcycle — third time issue with my engine

Address:

Hanuman nagar, Patna, Bihar, 800020

I have a ktm rc390. Its the third time that the piston caliper has got damaged in my bike. At approx 9800 km, first time my bike's engine got seized. After repairing in ktm service centre again at 16000 km piston caliper got damaged. Again i got it repaired by the company due to warranty but from that time i got mobile leckage issue in my bike from engine. I thoroughly complained in the company about this but they ignored it easily. Now when this time when its 23000 km and i took my bike for servicing and change of engine oil i got stuck again with the piston caliper problem which happend at 16000 kms. As previously they took out the mobile from engine then put the new engine oil and rapidly accelerated and then there was black smoke from exhaust. And again the same happened. I am completely fed up with this now again they are asking for 30000 to get it repaired. My bike warranty of 2 years has just lapsed 4 months from now. It is ver disgusting to keep such a reputed company bike and face so much issues with it.
I request you to look over my problem and get it fixed because i have spent a lot of money on buying and repairing it again and again unnecessarily.
I shall be highly thankful for your kind cooperation.
To contact: [protected]@gmail.com