No Aftersales Service from JMC

We purchased a brand new JMC vehicle from the Pinetown dealership. All services etc are up to date. There was a problem with the engine and they took it in for over 2 months and repaired it. Now 8 months later, the truck is still having issues with the engine. No response to emails. calls etc from their Head Office. Shocking aftersales service and I would not recommend this brand or company.