Bad services to resolve a TV with credit note.

We bought a Hisense TV from Makro in alberton in December same of my apps didn't work on my TV as it was December they were closed on the 21January I contact Kgoso at Makro Alberton he then arrange for a technician from Hisense to come to my property then they advise they need to put in a new motherboard after a week I did a follow up they will sent another technician to update the software. The next day they came back and advise they can't update the software we need to get an new TV on Friday I was advised they have requested an credit note so I can replace my TV. Went again to Makro to find out what is happening they told me they have requested an credit note and got a reference. Now they called me and advise me they have re open the job card for a technician to come and look again. Really 4 technician to come and do a job. Hisense is unreasonable with their customers services. I was also advise by Makro after the 3rd attempt they will come to the party to assist us. Now I must still wait. Spoke to Jabu as Hisense call centre told him my TV is a white elephant as we can't watch the app that is not working he told me I must watch something else. Who do he think he is and everything the manager is not available. I need this matter to be sorted out as soon as possible.