Poor service from Vodacom Insurance

I recently upgraded my device and took up a 2 for 1 deal. I added insurance during the application process thinking its for both devices as there was only 1 option for insurance and since I have never taken up device insurance with Vodacom, I was not fami**** until they sent confirmation via email, that's when I noticed only 1 was included. I then called Vodacom insurance on the 23rd to add my other device with my sister's number as the other device was for her. Mathapelo Ramolula then sent me the forms via email and politely explained how the insurance worked (her service was good) however I have not received any feedback from Vodacom insurance regarding confirmation of adding the other device, instead an amount of R43 was just deducted from my account. I have to follow up from time to time without getting any assistance which is getting a bit frustrating as I need to make sure that both my devices are insured. Your prompt feedback will be highly appreciated