Bad Samsung experience

I renew my contract begin of June and took a Samsung A32. I had the phone for a week I couldn't phone out or no one could phone me. I took it to mtn and they send it in 2weeks later I got a new phone the Friday 4 days later the new phone gave the same problems. I took it in again and now I'm waiting on feedback. I send Samsung a mail and they said I must check my Sim card but my Sim card works fine in my old phone. When I wanted to send a mail back it looks like Samsung blocked me because my email doesn't t go through. I mean really its a brand new phone and it's giving me problems. I will never use Samsung again