TATA SUPER ACE BAKKIES - TERRIBLE!!!

We bought 2 Tata Super Ace bakkies in 2013. During the first long distance trip we did with the 1 bakkie, not 1000km on the clock, it overheated and had to be towed in by Tata. This bakkie was then taken back by the dealer and we were issued with a new bakkie. The old bakkie was registered in our name by the dealer and they said they will deregister it when they register the bakkie that was exchanged. This never happened and we had to pay 2 fines on this bakkie as well as the lisencing fee before we could renew our own bakkie's lisence.Both bakkies has broken down numerous times. The one bakkie again overheated and we took it on 27 Nov to the Newlands dealer in Pta. It was there until 2 Dec and we fetched the bakkie but had not driven 50km when it overheated again. It was taken to the Olifantsfontein dealership, who informed us they cannot repair the bakkie as they do not have any thermostats in stock and were waiting for a new shipment. We had to wait until 15 Jan and it overheat again within 40km. It was towed in to Tata Pta Central. It is still there. This is almost 3 months that we have no use of the bakkie. Tata Sa was notified, but almost no help or response from them!