Dissatisfaction with Cellucity Mall of Africa

My phone is covered with Cellucity insurance, I then took my phone in for repairs after it fell and cracked. I was told to go fetch my phone as it has been finished however it turns out the phone is fixed but the Fingerprint ID is no longer working as the phone had cracked at the back meaning it was brought back not working. This is after I have traveled 7 times to Mall of Africa concerning the same phone for it to get fixed however I'm not getting any help from the technician Mr Isaac Malesela who is also constantly rude to me as the customer