No network on mobile data and after several visits to various Vodacom shops and centre and calling the call centre no feedback on fixing my problem

I had to replace my old phones screen. I did that at a private company. Ever since then I couldn't use facebook or send media files on whatsupp . It just said check your internet connection. I decided to get a new phone. Same problem. And everytime I went to a Vodacom shop they just said it was the device. A new phone??? I phoned Vodacoms call centre and the consultant did a VPN reset. Still not working. I again went back to Vodacom and they did a sim swop. Same problem. Phone only works on Wifi not on mobile data. On Thursday 28 December 2017 I went to the main Vodacom Centre in Bloemfontein Westdene. The consultant just took my phone and went behind doors came back and said its working. I asked him what he did for what if it happens again then I know what to do. He really didnt explain the procedure to fix it in future just said there was a block on my sim. so I trusted it was working and went home. Came home still couldnt send media files on whatsupp of see photos on facebook. It keeps saying retry or connection. The same day I went back to Vodacom Centre and the consultant took my details and said the technition would go into my number to check what the problem is. He said someone will phone me in 24 hours. Its Saturday night 21:00 and no feedback on the problem . This is really poor service from Vodacom as I have been a customer for 15 years. Its frustrating having a new phone and you cant use it. I have lost alot of data for not being able to use my phone. Its almost new years and I cant even send my family and friends messages or see whats going on on facebook how everyone is celebrating the new year. This problem was the same at Christmas. No connection on mobile data. If this problem is not sorted out I am concidering moving my number to Cell C. Vodacom has not once in several visits and phone call told me what the problem is. In fact the some consultants even shaked their heads and said they dont know what is the problem. My response was you are Vodacom, you should know what to do. Im really dissapointed in Vodacom and their service. I really do home someone will contact me regarding this matter. If you really do value your customers. Please keep in my mind I have a hearing disability. Its really difficult for me to have a conversation over the phone. I do prefer email ********** . Come on Vodacom pull up your socks. What is the use of having a Samsung J5 and not being able to use it as your service provider cant figure out what the problem is.