Porting from Rain to Telkom

Requesting assistance! I am trying to port my mobile cell number from Rain to Telkom before canceling my contract with Rain. The request to port to both providers (Rain and Telkom) have been done through their call centres as well as in store (Telkom). Telkom insists that the porting needs to be resolved with Rain, and Rain insists it needs to be resolved with Telkom. I am currently stuck in between and paying for both services. I am trying to get hold of any supervisors at both providers' call centres, but not getting any assistance. Feeling helpless, I had thought to lodge a complaint with the Independent Communications Authority of SA. Has anyone had similar issues before and know how it can be resolved?