TELKOM change Porting of line to them without any approved paper work from my side

My telkom line was port to another service provider in 2028. Suddenly y phone was not working anymore, on enquiring from my current service provider they informed me that my VOIP is now back with telkom. When we tried to re-assigned they told me the line number was de-activated. since then i struggled to get the line activated again. no agent phones back, and Telkom self is not answering any calls