Telkom ignores service problem

I app**** for an ADSL line almost a year ago. I am being charged monthly for the service however the ADSL line they gave me is crossed with another number. Every time I report my problem I get an sms stating that my line has been checked and found to be in working order. I have stood in a queue weekly to explain to the service people that the line is CROSSED because I get calls coming to my house for an employment agency. They tell me they will escalate my problem and what do I get.... another sms...your line has been tested and found to be in working order.. PLEASE TELL ME WHERE HAS MY LINE BEEN CONNECTED BECAUSE ITS NOT IN MY HOUSE.