Tata Motors — Tata nexon xma delivery delay

I boked my Tata Nexon Petrol XMA, AT, Red from TAFE Access chennai on dec 4.2021. i was told 70 dys delivery and now its over 120 days. Till date no delivery and the dealer is clueless and changing dates. The dealer raised a complaint with tata REF #[protected] on mar 17.2022 which does not have any update.
I raised a direct complaint with TATA Motors on April 9.2022 ref #[protected]. im waitng for a response.
If tata cannot deliver the cars on time or with +/- 10 % tolerance why are they promising and what kind of Production and delivery schedule plan they have on their plants. Looks like all are inefficient planning People.