My 72 years old mom bought a phone on this shop, it didn't work because of network fault so on the 26th of March she went to complain and they admitted their fault and gave her the new one so that new phone isn't working, so I phoned them and they said sh

My 72 years old mom bought a phone on this shop, it didn't work because of network fault so on the 26th of March she went to complain and they admitted their fault and gave her the new one so that new phone isn't working, so I phoned them and they said she must take it to vodacom shop for repairs, unfortunately she can't go up and down to fix the fault phone as she's sick and remember it's the same model that they are aware that it's faulty. They must give her another new phone or refund ASAP