Incompetence from Cash Crusaders Cape Town Adderley Branch

Early in March I took my Doogee phone to Cash Crusaders Adderly str Cape Town (Store Manager: Nadine Smith)to have it repaired as the screen just went blank and the phone was still under warranty (Was bought in Oct/Nov 2020). I've given them all paperwork and information as requested by them. Its been 2 months now and they are still making excuses as to why the phone has not been repaired. I would like to have a refund or a new phone now as this is completely unacceptable. To make things worse, they have not kept to there promises of contacting me with any updates, even though i've been to there store numerous times and they would assure me of a follow up call.