Problem with mobile data service on iOS 11.1.1

Since I have done a iOS update to iOS 11.1.1, I am having problems with my Iphone 6s Plus mobile data connection on a Vodacom contract. If the phone has been on a wifi connection and you are back on mobile data, it does not work. To get it working again, you have manually go to "mobile data", enter "mobile data options", then enter "mobile Data Network" and then "reset settings" everytime. I have contacted Vodacom about this problem and according to them it is a problem with iOS 11.1.1. of which Apple is aware. I have this issue for the last 3 weeks.

Has anybody got some advice. Really cumbersome having to manually reset my mobile data settings everytime.