Bajaj — Vehicle service

I purchased bajaj platina on 9/11/2019. Its under a 5 year warrenty period. today i have undergon the fifth service of my vehicle on around 13000km
i was told my the bajaj service centre employee that there was only 10ml engine oil in the bike which is not justified as the last service was undergon just 2 months prior this period on 10/8/2021 all the service was undergon by authorised bajaj service centre i want to ensure that that service cente official did not deliberatelt put let engine oil in the last service as it was supposed to be free. Kindly look in my matter as soon as possible my vehicle number is HR03Y5796 you can contact me on my number [protected] or my email id [protected]@gmail.com