Poor service and no delivery

I submitted my ipad for repair on 29 Decemeber 2017 at Brooklyn (job #BNPA030681). I accepted the quote and was told they have stock of the battery and it would take two days to repair. Went to the store on 4 January 2018 and was told they haven't started but will start with it immediately. Went back on 7 January 2018 and was told the technician is actually busy with the iPad when I got there and they will let me know when it is fixed. Reason for delay was "out of stock". Went back today 9 January 2018 and was told the technician has got some sort of emergency and that the iPad will now be taken to Menlyn for repair. Asked to speak to the manager/owner and was only diverted to an assistant manager in store who assured us that it will be fixed on Thursday 11 January 2018. My daughter needs the iPad for school starting next week which means there is no way to get this fixed if you don't deliver. Please can you assist from head office to get this resolved.

Thanks

Willem Coetzee