Samsung - worst service and product

I own a Samsung Gear Fit2PRo. I have had more than my fair share of issues with the unit. It has been taken in 3 times for repairs - never to stay repaired. Firstly the only service centre is nearly 50km away from where I live, there is no help forthcoming from Samsung SA, any of its name stores nor distributors regarding repair of the unit - the only option is to take time off work and take it in. It is now in for repairs at All Electronincs for the 4th time. The Unit has been there for nearly a week. The only feedback is that they cannot find the fault and it is still being tested - how long does it take to establish (like I told you) that the screen now does not work? The manager of the store NEVER returns a call, there is no feedback what so ever!!!!!!!!!!!!!!!!!!!! This has to be the worst service/experience I have ever had with Samsung. I mean the 4th repair in less than 1 year???? At what point do you decide to just (PLEASE) replace and obviously faulty unit???????