problem with sim activation

So I really don’t know what to do first of all when I was trying to get my verification via video done this guy that I got was really rude for some reason and I couldn’t hear what he was saying and when I finally heard what he was saying he just mumbled something and still rudely btw and he stopped the video call process thing and then the next time I tried, he told me that I need to change my name and I told him that is the way my name is and just said change it and try again and when I finally tried to try again after literally looking for help on quora because all the help offered by the o2 doesn’t seem to help and isn’t clear at all, now there is no option for me to choose from and I’ve been on this for like four five days now I downloaded the app only for it to also turn out to be of no help and I really was disappointed because I’ve been seeing so many ads of o2 literally everywhere and I can’t even do anything on my phone without getting an ad about it only for it to turn out such a disappointment. Unbelievable . And they just keep spamming me with emails