Edgars and RMCS

I noticed that my number had been registered to a contract company called RMCS. I am an Edgars customer and I believe Edgars is that one that gave my number to this contract company. I have been trying to terminate this contract but with no luck. I recently lost my phone and needed to do a simseap. I went to Vodacom and they directed me to Edgars because they cannot do anything as I am under this contract. I went to Edgars and they called an RMCS agent who then took my details and told me that they would send me an email with a letter to take to Vodacom within 24-48 working hours. It has been a week now and still nothing has been sent to me. That is my primary number therefore I desperately need it. I really need help with this issue, it’s extremely frustrating.