Disgusting Communication and Service for Telkom claim

I handed my phone in for repairs to Telkom. I received sms notification that the repairs will not be done until I pay my excess. There is no clue as to how or where I need to pay my access. I have emailed *** and i got a failed delivery report due to the mailbox being full. Emailed *** and my email was rejected. I have no idea on how to proceed and need my phone as soon as possible.