Bad service, bad vehicle

What can I say? During or about January/February 2022 my XUV600 was taken to Mahindra for the gearbox (on 46 000km), it had to go in twice, because the first time they only "attempted" to repair the broken gearbox. Thereafter the gearbox had to be replaced. My vehicle was with them for approximately 8 weeks. We had to keep on following up with them, as they did not keep us up to date. On 02 July 2023, my vehicle's turbo blew (on 120 000km). Once again I am without a vehicle. A new turbo was installed and I was advised that before they return the vehicle back to me, that they will first flush the engine to ensure there are no carbon shavings found and they also needed to check the engine to see if anything else was damaged. When I got the vehicle back, it was smoking heavily, there was a knocking noise in the engine when accelerating and the vehicle was under powered at times. When my husband brought this up with the workshop manager, he told my husband that there was oil left in the exhaust and it would burn away as we drive the vehicle. The noise that we heard was also caused by the oil in the exhaust system causing the engine to pre-ignite, hence the noise. The workshop manager explained further that this issue would also correct itself once the oil has burnt away. He asked my husband to check the oil level each morning before we start the vehicle. About 2 weeks later nothing changed. We returned the vehicle and was advised that the injectors were damaged, whereafter my vehicle was booked in again. So, in other words, they did not flush the engine or check the engine for any other damage. Of course it was necessary to order the parts from overseas. When the injectors arrived and after it was installed, a few days later, my husband received a phone call and was advised that the injectors are faulty and that this was taken up with head office. In all this, we have been phoning to obtain updates, sometimes leaving messages, which have been unanswered. I have now been without my vehicle for 3 months! We have not received any further communication regarding the way forward on how this situation will be remedied. I contacted the workshop and the person I was supposed to speak with, was not available and I left a message for him to contact me. When I received no call back, I on 22 September 2023, sent an email demanded that someone contact me with a resolution to this issue. It is now 28 September 2023 and I have yet to receive a phone call... This is the worst experience, as I am loaning a vehicle. I cannot loan this vehicle indefinitely, or one day when my vehicle will be repaired and returned back to me. This is now becoming ridiculous!