Royal Enfield — Gt 650 issue

I brought my gt 650 in April 2022 within after 1st service my bike started give engine fault and black smoke from one silencer. I approached to palladium service center which is in mira road mumbai. They were like we need to check and they have to call technician two times the bike was kept for more then a month Dan later they replaced some parts Dan they charged me for th oil again and oil filter within 7 months I changed three times oil's and oil filter and they charged me for that, now again m facing the same issue and they don't have any resolution and they are like let's wait for tech ppl to come. Why is it happening to my brand new bike