Vodacom samsung s20 fe

I upgade my contract with vodacom and received the samsung s20 fe on the 18th may, whent to vodacom on the 21th may to tell them the phones battery is draining to fast, they said i must bring it in the next day so can book it in as a out of box failure, i did that... After about 8-9 days got it back and they said it was a software problem, that same night i charged it full took it off before i went to bed, didnt load anything funny on the phone just my contacts and whatsapp, i woke up next morning phone has dropped by 15% just by lying there, and my friend that works with me has the same phone from cell c and he also charged hes that night and he plays alot with hes phone and when we got to work myne was alredy in the 70% and his stil in 90% and as the day went pass i didnt really play with my phone and the battery drop alot to about 30% when i got home. Took it back that next day to vodacom they send it away again and after 2weeks,from me phoning around to vind out whats happeningi had to phone the repair center and i had to ly a complain to the repair center, because they say theres nothing wrong, finally they said they swop it with another s20 fe and i did ask then i would rather want a different make seeing that the samsung is giving me problem and i did take it back to then with in 7 days, but they sent me that s20 fe on the 24th june and it did the same problem and the phone started freezing, took it back 26th and now they send it away again, i mean its bean more then 5 weeks that im have problem with vodacom, i just want then to replace the foon with a different make, seeing that the s20 fe is giving so much problems