SAMSUNG S20

Unacceptable service by Samsung call centre and after care service received ,I bought a new Samsung s20 phone from vodacom at Mall of Africa for R19000 cash and a few days later I notice my phone gives me an error on the screen say REFRESHING SIM CARD(IT DOES THIS MAYBE 20 OR 30 TIME A DAY),I called the vodacom store and they said I should purchase a new sim card and that if it doesn't fix the problem I should go in to samsung,then Lockdown came ,I waited and then finally got a new sim card and the same problem persist with while on the call the phone loose signal for a few seconds,endless problems with the Samsung S20,i called Samsung call centre and they said its probably the sim reader(not my problem but theres) i should bring the phone in and they need 10 days to check it out and will let me know,how can I leave my phone for 10 days when I don't have another phone to use,my phone is an essential item for my business ,clients won't be able to get hold of me and I will loose alot of business.buying an expensive Samsung phone is just not worth it anymore,I previously han an old Samsung S7 with no problem,Samsung should up there game and give customer good quality phones and proper guarantees, because this is ridiculous ,I will be advertising my Samsung s20 problem on all social media so that cusumers should know what to expect when purchasing the Samsung s20,thanks .DISAPPOINTED CUSTOMER