Ineffecient and ineffective services

Was at Vodacom as received my device back on Friday since receiving this device back faced with additional issue after Vodacom repairs it's echoing and receiver cannot hear me, biometrics finger and power when unlocking is not instant, as there are no longer loan phones kicked from pillar to post again. Cannot understand the ineffecient and ineffective services being rendered as a client. Vodacom is unable to remedy this defective phone whilst having to bring it back and forth and inconvenience of data backups and charges from devices as much is being lost and having to pay for this cannot be accepted. Mr Mfanelo was able to assist me as the manager Ms Neo also not available to assist us. Kindly shed some light as cannot be sent from store to head office as you claim to have repaired my phone and I find additional problems after receiving my device. You have taken my screen guard and not replaced this either.