Samsung agent non responsive to complaint

In mid May I logged a repair request with Samsung. My fridge was leaking small pools of water on the inside of the fridge. Samsung appointed their agents in PE, MMR Electronics to assess and repair the problem. MMR diagnosed the problem as a faulty evaporator and heater which they replaced at a cost of R2,700. However, this did not solve the problem. After lodging a complaint, MMR agreed to replace another part free of charge. After doing this however the problem continued. I reported this to MMR and the owner promised to come and look himself on 21 June. To date, despite attempts to contact him, he has not visited nor is he returning my calls.