Telkom line

Have a legal contract with Telkom since 1990 and gave the line to another person without the owners consent. On Saturday 13 June 2015, a telkom technician phoned our residence and stated that the existing line with telkom does not belong to us. He claims that the line belongs to a black person. On Sunday the line was switched off by the same technician and has been off ever since. When phoning telkom everyday, after 5 days the line is still off. The response from telkom is that they are working to fix the problem. Tired of this as there is no joy from telkom's side. Worst part of all, is that i have nnever skipped any payments and that i have the line for 26 years. Where is this country going to.