Bad service from Ackermans

I have had a bad experience with ackermans dobsonville or should i say ackermans as a whole, because i have also contacted the head office but still no help from them.i bought a Nokia c10 in December of 2021 and it has given me problems since then.i have taken it back to the store twice for repairs but the problem persists,i then asked if they could maybe give me a different phone but im told to call the customer care when i do im told to go to the store with the phone and everything it came with but still i haven't gotten any help from them.they sent the phone back to me a week ago but i still encounter the same problem i did before it went for repairs.can i please get help from ackermans by giving me another brand or my money back so i can purchase a new phone.