Unable to reach Telkom

We had an account with Telkom, an old account that was in arrears, I settled it and we took another line, as in opened another account, I think the service has been terminated when the old account was in arrears, and I started paying them again every month from May. I just received a statement with a refund due to us of R1 300, I have been trying to get hold of telkom's finance department since August, the phones just ring, I tried 10210, ***.Please help.