fridge/freezer not cooling

I bought a Hisense fridge/freezer from Makro in Novemver R2013. It is the second time in 6 months that we had losses as the freezer is not cooling. Except for the losses we had to wait almost 3 weeks to have it repaired the first time with numerous calls and visits to the Makro store. Makro staff blamed Hisense and vice versa. It is now the second time in 6 months that the same incident happend and again empty promises to have it fixed before the weekend after we informed Hisense and Makro on 09.08.2015 that we cannot afford to be without a fridge and freezer it is now the 14.08.2015 and after several calls and mails we were told today that the spare part will only arrive on Tuesday 18.08.2015! After begging and pleading and complaining we are told that Hisense cannot replace the unit and we just have to wait for the spare parts to arrive. I am still waiting for a manager from Hisense to contact me as requested, but without joy. So much for customer service.