Service provider fault

Signed a declaration for my first claim for the amount of R750 access fee and then my device was not fixed to standard as it went for screen replacement but came back with damages of the speaker and microphone which were damaged during the repair. The declaration states that my 2nd claim within 12months will be R1000 but now I'm told that I have to pay R1850 access for damages caused by finrite repair center.. I pay my dues but when I claim they not adhering to their own terms and conditions. The repair slip states that an iPhone is to be assessed and replaced with available stock but mine was opened and broken. I need my phone fixed.