toxic service and very bad product sold to me Dixon L5 cellphone

On Friday 07/07/2023 i bought a brand new Dixon L5 cellphone from Cash Crusaders Middestad Bellville mall cape town. After taking it home i later on realized that this phone is not going on internet and the hearing part of the phone when you call someone it doesn't bring out a clear voice. Today i took the phone back into the store so that they can check on it. The sales assistant who assisted me by the name Elvis when i purchased this phone told me that this phones are there because they have a problem with network and that's the reason why they are sold at R999. So i requested to see the manager of which the manager was very rude and terrible. i waited from 09am until 2pm for them to assist me and they were trying to convince me to take the phone that they know it has a problem already. They then accused my network provider for poor service network service Telkom. We phoned Telkom because the manager of this store by the name of Asheeqah was persisting on telling me that its my simcard Telkom that doesn't have the right service. Telkom checked on the system they confirmed that the simcard is 100% working and when i put it into another phone the internet works perfect. i then requested for a change of phone and top R100 for a second hand phone that was available that moment but the manager refused saying they cannot take back phone that is not sealed so i have to look for somewhere else to sell it yet this is their product and this phone i just bought it 2 days ago. Now they changed simcards ports and said the phone is now working yet now i am home in table view the phone doesn't work again. I requested for a refund because i don't want their option to wait for 21 days yet i bought this phone because i want to use it now. But she refused to refund me back. i asked the manager to write a note stating that they have tested the phone and its working but if the same problem persist again they will have to refund me my money back but she refused and made me look like i got this phone for free.