Bad Signal only 3G

<p>I would like to start off with saying that I switch over from MTN to Vodacom last year, because of MTN being so bad in service and not resolving any problems. Now I am with VODACOM and I have signal problems. Since being on Vodacom I have never had 4G. I have been to a Vodacom shop and they said they have changed the APN and I shall give it a few hours to restart my phone and then I will have 4G. 2 weeks later I went back to another Vodacom shop and I said to do a sim swop because I thought it was the sim, still nothing. Still nothing after 1 week. By this time I am beyond furious. We then thought it was the phone that is giving problems. My son came over the weekend so we swopped each other sim card and then in his phone still 3G but now his sim card in my phone 4G no problem. So now I definitely know it is the sim card. Another 2 weeks went by where I am struggling to get signal, it goes from Edge to No service and then to 3G again. So I decided to go to VODAWORLD in MIDRAND to sort out this problem. I have been there waiting at customer service now for almost 2 hours before someone helped me, by then I have explained myself and the problems I am having. They said my APN or something like that was never set to 4G and that they have done it now. I should wait 1 hour switch on my airplane mode, switch off the phone, wait 5 min and then switch back on and turn off airplane mode, still nothing!!!!!!!! So now I am writing so that this can be sorted out once and for all. I have WASTED so much of my TIME and FUEL going to Vodacom shops trying to sort out this problem. </p>