Royal Enfield — Petrol tank issue within 1 and half years of purchase

I have purchased thunderbird 350x on 24th January 2019. My bike had completed around 16500 kms. My bike is serviced regularly in authorised Royal enfield service center. My last service is done on 31st October 2020. At 20/11/2020 fuel started to leak badly from bottom of the bike after petrol refill. I went to authorised service center in OMR, nehru nagar, kottivakkam, chennai, tamilnadu - 600096. In service center they said that they will replace the tank with warranty but it will take up to 1 month or more i am really annoyed by this how can a bike get this kind of fault with 1and half years of purchase and i have planned to go for trip on December 25th but because of this i dont know when my bike will get ready if i miss this opportunity i cannot go for trip for another 4 months. I am really disappointed.