Royal Enfield — service complaint, unwanted service provided

Address:

Sharpile royal enfield service centre, chirakara, thalassery, Kannur, Kerala, 670103

I have done a service of my classic 350 from sharp-line service thalaserry, i have done the oil change before 2 months and given this time too for normal service but they did the oil change again saying the oil was dark and need to be changed. I don't think my vehicle is in need of an oil change now because i'm pretty sure it did not run more than 1000 km, i only ride an average of 5 km a day. I find it difficult to claim my complaint as my meter is down and couldn't read the km. Please find me a solution for this and im ready to accept their claim if you can find me quilty