Very Bad Service from Samsung

I have been having trouble with my Samsung S10 since end of Feb 2020. The phone is under warranty and not yet a year old. Comes up with an error whenever I want to charge it. It is an intermittent fault. This is the 3rd time I have sent it for repairs, 1st time at Vodacom, and the next 2 times at Samsung. Every time the phone comes back from repairs, it is fully charged so there isn't any error but as soon as the battery is low and I need to charge it, the error comes. And I have tried to explain this to Samsung that it is intermittent but they don't understand!!!. All their technician does, is charge the phone from their side and send it back to me. How many times do we have to go back and forth with this plus I have to keep calling them. This is ridiculous service!!!. I want the phone to be swopped for a new unit as it is still under warranty. What's going to happen is this issue is going back and forth until the warranty is over then Samsung will advise that they cant help me. I have supp**** photos and a video of the error. I need someone to urgently assist as this is poor service from Samsung and this is a work contract phone. Ref Number : ***.