Royal Enfield — Delaying bike delivery

Address:

Shop No. 1, Sambhav Darshan, Opposite Poisar Masjid, SV Road, Kandivali West, Mumbai, Maharashtra 400067

Sir i had booked classic 350 stealth black on 22-feb-2020 at voyage motors,
Shop no. 1, sambhav darshan, opposite poisar masjid, sv road, kandivali west, mumbai, maharashtra 400067, its been 122 days and still i got nothing i had paid full amount of bike. When i call them on 10-june-2020 after lockdown they were saying your document is in rto and next week you will get registration number but then also i get nothing and after 2 week means today i call them once again they promised me this week i will get my registration number. I don't know what to do now. Please help me. I just want that if they can give me delivery of my bike this week then i will thank them with sweets or if they can't just give me my refund. Please help