Unable to switch off SMS roaming

I did sms roaming on 22/9/2017 and I came back to SA on 29/9/2017, I tried to switch it off by smsing ROAMOFF to 31050, I got an sms saying it was switched off but it is not off, I called your call centre (111) they told me they can't assist me, I must go to a Vodacom shop, I went to a Vodacom shop in Southdale on Saturday (29/9), they told me they can't assist me, I must phone the other call centre to assist (1946) , I phoned 1946, they also could not assist me, they logged a service request for me and said it might take 7 to 14 days to resolve this. I don't understand why switching off roaming is so difficult, I currently cannot make any calls since Friday (29/9) and I find your call centre staff very unhelpful. Please resolve this ASAP.