Telkom accidentally cancelled landline and lost the number.

Last year I decided to switch to Vox fibre with the intention of porting our landline number over to Vox. In the process Telkom completely/accidentally cancelled the landline number and now say it is not possible to get it back. Every time I've called the support I get a different answer on what the process is and what is possible. Some of advisors say you have to take out a new landline service (and pay for it) etc. Surely some one at Telkom should know how to fix this? I'm losing a lot of business as people would normally use that number.