Dissatisfied - aftermarket service -terrible

I have purchased a Hisense Smart TV im March 2019. On the 18/12/2019 the TV only has sound and no picture. I logged a call with Karabo Sanyane who advised me it will take 1-7 working days to resolve. I appreciate the fact that the turnarounfd time is what it is but when I called two consultants in one morning and also left my number for them to call me back , there was no response. the first call was about 8-10 minutes and and thereafter when i called the second , my airtime was depleted. my wife's airtime was finished on the first call. while on the line the consultant couldn't assist me with any information or couidn't call me backwhich he promised to do. I am appauled at the way they handle customers and I will never buy another Hisense product due to my experience. Hisense - you are such a huge company- please employ consultants who can be re**** upon .