HISENSE APALLING CUSTOMER SERVICE

My TV has a black shade on the left half side of the screen which makes the picture dark. i have a warranty with hisense with expires end of August, i put a claim on 22.05.2019 and on 27.05.2019 i was told a technician will call me to come collect the TV, Till date im still waiting for the technician to come just collect my TV. I escalated the matter to the service manager Dineo Mkhonto and on the same day she said the technician is coming without making arrangements with me first and also the technician called me and explained to him i was at work he must come tomorrow. Ever since 06.06.2019 the technician has been saying he's coming but never comes to collect the TV. When i asked them to assign to a different technician i was told they only have 1 technician in the south. This is really unprofessional and unacceptable